Enable remote SIM protocol log level

It's defined in logging.h for quite some time but is not actually
enabled alongside with other internal logging categories.

Change-Id: I0e7a2add6293a072752900608c8ba34cc3850f31
diff --git a/src/logging.c b/src/logging.c
index 2bb53ae..09021e4 100644
--- a/src/logging.c
+++ b/src/logging.c
@@ -169,6 +169,11 @@
 		.description = "libosmo-netif Jitter Buffer",
 		.enabled = 1, .loglevel = LOGL_NOTICE,
 	},
+	[INT2IDX(DLRSPRO)] = {
+		.name = "DLRSPRO",
+		.description = "Remote SIM protocol",
+		.enabled = 1, .loglevel = LOGL_NOTICE,
+	},
 };
 
 void assert_loginfo(const char *src)