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/bsc_init.c b/openbsc/src/libbsc/bsc_init.c
index 8e62dac..c173c62 100644
--- a/openbsc/src/libbsc/bsc_init.c
+++ b/openbsc/src/libbsc/bsc_init.c
@@ -102,7 +102,7 @@
 	}
 
 	DEBUGP(DRR, "SI%s: %s\n", gsm_sitype_name(i),
-		hexdump(GSM_BTS_SI(bts, i), GSM_MACBLOCK_LEN));
+		osmo_hexdump(GSM_BTS_SI(bts, i), GSM_MACBLOCK_LEN));
 
 	switch (i) {
 	case SYSINFO_TYPE_5: