src: use namespace prefix osmo_* for misc utils

Summary of changes:

s/bcd2char/osmo_bcd2char/g
s/char2bcd/osmo_char2bcd/g
s/hexparse/osmo_hexparse/g
s/hexdump/osmo_hexdump/g
s/hexdump_nospc/osmo_hexdump_nospc/g
s/ubit_dump/osmo_ubit_dump/g
s/static_assert/osmo_static_assert/g
diff --git a/openbsc/src/osmo-bsc/osmo_bsc_bssap.c b/openbsc/src/osmo-bsc/osmo_bsc_bssap.c
index 5046d8c..a3ba2ad 100644
--- a/openbsc/src/osmo-bsc/osmo_bsc_bssap.c
+++ b/openbsc/src/osmo-bsc/osmo_bsc_bssap.c
@@ -158,7 +158,7 @@
 	if (data_length == 3 && data[0] == CELL_IDENT_LAC) {
 		lac = ntohs(read_data16(&data[1]));
 	} else if (data_length > 1 || (data[0] & 0x0f) != CELL_IDENT_BSS) {
-		LOGP(DMSC, LOGL_ERROR, "Unsupported Cell Identifier List: %s\n", hexdump(data, data_length));
+		LOGP(DMSC, LOGL_ERROR, "Unsupported Cell Identifier List: %s\n", osmo_hexdump(data, data_length));
 		return -1;
 	}
 
@@ -467,13 +467,13 @@
 	header = (struct dtap_header *) msg->l3h;
 	if (sizeof(*header) >= length) {
 		LOGP(DMSC, LOGL_ERROR, "The DTAP header does not fit. Wanted: %u got: %u\n", sizeof(*header), length);
-                LOGP(DMSC, LOGL_ERROR, "hex: %s\n", hexdump(msg->l3h, length));
+                LOGP(DMSC, LOGL_ERROR, "hex: %s\n", osmo_hexdump(msg->l3h, length));
                 return -1;
 	}
 
 	if (header->length > length - sizeof(*header)) {
 		LOGP(DMSC, LOGL_ERROR, "The DTAP l4 information does not fit: header: %u length: %u\n", header->length, length);
-                LOGP(DMSC, LOGL_ERROR, "hex: %s\n", hexdump(msg->l3h, length));
+                LOGP(DMSC, LOGL_ERROR, "hex: %s\n", osmo_hexdump(msg->l3h, length));
 		return -1;
 	}
 
@@ -502,7 +502,7 @@
 	struct bssmap_header *bs;
 
 	LOGP(DMSC, LOGL_DEBUG, "Incoming SCCP message ftom MSC: %s\n",
-		hexdump(msgb->l3h, length));
+		osmo_hexdump(msgb->l3h, length));
 
 	if (length < sizeof(*bs)) {
 		LOGP(DMSC, LOGL_ERROR, "The header is too short.\n");
diff --git a/openbsc/src/osmo-bsc/osmo_bsc_msc.c b/openbsc/src/osmo-bsc/osmo_bsc_msc.c
index 6ea8c4f..2a32227 100644
--- a/openbsc/src/osmo-bsc/osmo_bsc_msc.c
+++ b/openbsc/src/osmo-bsc/osmo_bsc_msc.c
@@ -180,7 +180,7 @@
 	int ret;
 
 	LOGP(DMSC, LOGL_DEBUG, "Sending SCCP to MSC: %u\n", msgb_l2len(msg));
-	LOGP(DMI, LOGL_DEBUG, "MSC TX %s\n", hexdump(msg->data, msg->len));
+	LOGP(DMI, LOGL_DEBUG, "MSC TX %s\n", osmo_hexdump(msg->data, msg->len));
 
 	ret = write(fd->fd, msg->data, msg->len);
 	if (ret < msg->len)
@@ -226,7 +226,7 @@
 		return -1;
 	}
 
-	LOGP(DMSC, LOGL_DEBUG, "From MSC: %s proto: %d\n", hexdump(msg->data, msg->len), msg->l2h[0]);
+	LOGP(DMSC, LOGL_DEBUG, "From MSC: %s proto: %d\n", osmo_hexdump(msg->data, msg->len), msg->l2h[0]);
 
 	/* handle base message handling */
 	hh = (struct ipaccess_head *) msg->data;