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/libbsc/abis_nm.c b/openbsc/src/libbsc/abis_nm.c
index 6ca45f7..0d122c6 100644
--- a/openbsc/src/libbsc/abis_nm.c
+++ b/openbsc/src/libbsc/abis_nm.c
@@ -934,7 +934,7 @@
 		DEBUGP(DNM, "SW config not found! Can't continue.\n");
 		return -EINVAL;
 	} else {
-		DEBUGP(DNM, "Found SW config: %s\n", hexdump(sw_config, sw_config_len));
+		DEBUGP(DNM, "Found SW config: %s\n", osmo_hexdump(sw_config, sw_config_len));
 	}
 
 		/* Use the first SW_DESCR present in SW config */
@@ -1325,7 +1325,7 @@
 		len = strlen(line_buf)+2;
 		break;
 	case GSM_BTS_TYPE_NANOBTS: {
-		static_assert(sizeof(seg_buf) >= IPACC_SEGMENT_SIZE, buffer_big_enough);
+		osmo_static_assert(sizeof(seg_buf) >= IPACC_SEGMENT_SIZE, buffer_big_enough);
 		len = read(sw->fd, &seg_buf, IPACC_SEGMENT_SIZE);
 		if (len < 0) {
 			perror("read failed");