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/ipaccess/ipaccess-config.c b/openbsc/src/ipaccess/ipaccess-config.c
index e84892c..af0ea00 100644
--- a/openbsc/src/ipaccess/ipaccess-config.c
+++ b/openbsc/src/ipaccess/ipaccess-config.c
@@ -129,7 +129,7 @@
 	num_arfcn = ipac_rxlevstat2whitelist(whitelist, st, 0, 100);
 	arfcnlist_size = num_arfcn * 2;
 	*((uint16_t *) (physconf_buf+2)) = htons(arfcnlist_size);
-	DEBUGP(DNM, "physconf_buf (%s)\n", hexdump(physconf_buf, arfcnlist_size+4));
+	DEBUGP(DNM, "physconf_buf (%s)\n", osmo_hexdump(physconf_buf, arfcnlist_size+4));
 	return arfcnlist_size+4;
 }