switch from dev board to prototype

the SAM E54 Xplained Pro development board uses a SAM E54P20N
micro-controller.
the sysmocom sysmoOCTSIM prototype uses a SAM E54N19A
micro-controller.
the system LED and UART debug GPIO are different, else the code
is the same.
the Atmel START definitions have been updated accordingly.

Change-Id: Ifd15f6759c51b42a8d11b09f9f495d7e7a5b6afc
diff --git a/sysmoOCTSIM/hpl/usb/hpl_usb.c b/sysmoOCTSIM/hpl/usb/hpl_usb.c
index 6bf09ab..b5efe6c 100644
--- a/sysmoOCTSIM/hpl/usb/hpl_usb.c
+++ b/sysmoOCTSIM/hpl/usb/hpl_usb.c
@@ -154,7 +154,7 @@
  *  \param[in] s Buffer size, in number of bytes.
  *  \return \c true If the buffer is in RAM.
  */
-#define _IN_RAM(a, s) ((0x20000000 <= (uint32_t)(a)) && (((uint32_t)(a) + (s)) < (0x20000000 + 0x00042000)))
+#define _IN_RAM(a, s) ((0x20000000 <= (uint32_t)(a)) && (((uint32_t)(a) + (s)) < (0x20000000 + 0x00032000)))
 
 /** Check if the address should be placed in RAM. */
 #define _usb_is_addr4dma(addr, size) _IN_RAM((addr), (size))