sysmobts: Print the model number that is not supported.

When using an old kernel on revD hardware we will read garabge
from the EEPROM and it is nice for debugging to see which model
number has been picked.

src/osmo-bts-sysmo/utils.c

@@ -25,6 +25,7 @@
 
 #include <osmo-bts/bts.h>
 #include <osmo-bts/gsm_data.h>
+#include <osmo-bts/logging.h>
 
 #include "femtobts.h"
 #include "l1_if.h"
@@ -128,6 +129,10 @@ int sysmobts_get_nominal_power(struct gsm_bts_trx *trx)
 		/* 5W(39dBm) per TRX. This could be raiesd to 10W(40dBm)
 		 * if the second TRX is not used. */
 		return 37;
+	default:
+		LOGP(DL1C, LOGL_ERROR, "Model number %u/0x%x not known.\n",
+			fl1h->hw_info.model_nr, fl1h->hw_info.model_nr);
+		break;
 	}
 	return -1;
 }