wimax: fix gcc warnings in sh4 when calling BUG()

SH4's BUG() seems to confuse the compiler as it is considered to
return; thus, some functions would trigger usage of uninitialized
variables or non-void functions returning void.

Work around by initializing/returning.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>

drivers/net/wimax/i2400m/op-rfkill.c

@@ -54,8 +54,10 @@ int i2400m_radio_is(struct i2400m *i2400m, enum wimax_rf_state state)
 		/* state == WIMAX_RF_ON */
 		return i2400m->state != I2400M_SS_RF_OFF
 			&& i2400m->state != I2400M_SS_RF_SHUTDOWN;
-	else
+	else {
 		BUG();
+		return -EINVAL;	/* shut gcc warnings on certain arches */
+	}
 }
 
 

drivers/net/wimax/i2400m/usb.c

@@ -254,8 +254,10 @@ do_bus_reset:
 			dev_err(dev, "USB reset failed (%d), giving up!\n",
 				result);
 		}
-	} else
+	} else {
+		result = -EINVAL;	/* shut gcc up in certain arches */
 		BUG();
+	}
 	if (result < 0
 	    && result != -EINVAL	/* device is gone */
 	    && rt != I2400M_RT_BUS) {