start with USB CDC echo example

this is the Atmel START USB CDC Echo example project for the
SAM E54 Xplained Pro board using an Atmel ATSAME54P20A
microcontroller.
Atmel START information:
- Version: 1.4.1810 (Dec 18, 2018, 5:52 AM GMT+1)
- Server: 1.4.93
- Content version: 1.0.1340

This will serve as basis for the sysmoOCTSIM project

A jenkins contrib script has also been added to the
osmo-ccid-firmware project to build the sysmoOCTSIM firmware

Change-Id: I356de75e7b730d63fb819248e71d36f785932199
diff --git a/sysmoOCTSIM/hal/utils/src/utils_list.c b/sysmoOCTSIM/hal/utils/src/utils_list.c
new file mode 100644
index 0000000..4006a01
--- /dev/null
+++ b/sysmoOCTSIM/hal/utils/src/utils_list.c
@@ -0,0 +1,136 @@
+/**
+ * \file
+ *
+ * \brief List functionality implementation.
+ *
+ * Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Subject to your compliance with these terms, you may use Microchip
+ * software and any derivatives exclusively with Microchip products.
+ * It is your responsibility to comply with third party license terms applicable
+ * to your use of third party software (including open source software) that
+ * may accompany Microchip software.
+ *
+ * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
+ * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
+ * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
+ * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
+ * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
+ * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
+ * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
+ * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
+ * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
+ * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
+ * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
+ *
+ * \asf_license_stop
+ *
+ */
+
+#include <utils_list.h>
+#include <utils_assert.h>
+
+/**
+ * \brief Check whether element belongs to list
+ */
+bool is_list_element(const struct list_descriptor *const list, const void *const element)
+{
+	struct list_element *it;
+	for (it = list->head; it; it = it->next) {
+		if (it == element) {
+			return true;
+		}
+	}
+
+	return false;
+}
+
+/**
+ * \brief Insert an element as list head
+ */
+void list_insert_as_head(struct list_descriptor *const list, void *const element)
+{
+	ASSERT(!is_list_element(list, element));
+
+	((struct list_element *)element)->next = list->head;
+	list->head                             = (struct list_element *)element;
+}
+
+/**
+ * \brief Insert an element after the given list element
+ */
+void list_insert_after(void *const after, void *const element)
+{
+	((struct list_element *)element)->next = ((struct list_element *)after)->next;
+	((struct list_element *)after)->next   = (struct list_element *)element;
+}
+
+/**
+ * \brief Insert an element at list end
+ */
+void list_insert_at_end(struct list_descriptor *const list, void *const element)
+{
+	struct list_element *it = list->head;
+
+	ASSERT(!is_list_element(list, element));
+
+	if (!list->head) {
+		list->head                             = (struct list_element *)element;
+		((struct list_element *)element)->next = NULL;
+		return;
+	}
+
+	while (it->next) {
+		it = it->next;
+	}
+	it->next                               = (struct list_element *)element;
+	((struct list_element *)element)->next = NULL;
+}
+
+/**
+ * \brief Removes list head
+ */
+void *list_remove_head(struct list_descriptor *const list)
+{
+	if (list->head) {
+		struct list_element *tmp = list->head;
+
+		list->head = list->head->next;
+		return (void *)tmp;
+	}
+
+	return NULL;
+}
+
+/**
+ * \brief Removes list element
+ */
+bool list_delete_element(struct list_descriptor *const list, const void *const element)
+{
+	if (!element) {
+		return false;
+	}
+
+	if (list->head == element) {
+		list->head = list->head->next;
+		return true;
+	} else {
+		struct list_element *it = list->head;
+
+		while (it && it->next != element) {
+			it = it->next;
+		}
+		if (it) {
+			it->next = ((struct list_element *)element)->next;
+			return true;
+		}
+	}
+
+	return false;
+}
+
+//@}