mfd: Fix more undefined twl4030-power resconfig value checks

Based on Aaro's previous fix, this needs to be fixed for the newly added
remap_off and remap_sleep resources as well.

The code tries to skip values initialized with -1, but since the values
are unsigned the comparison is always true.

The patch eliminates the following compiler warnings:

drivers/mfd/twl4030-power.c: In function 'twl4030_configure_resource':
drivers/mfd/twl4030-power.c:338: warning: comparison is always true due to
limited range of data type
Signed-off-by: Amit Kucheria <amit.kucheria@verdurent.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/twl4030-power.c

@@ -398,12 +398,12 @@ static int __init twl4030_configure_resource(struct twl4030_resconfig *rconfig)
 		return err;
 	}
 
-	if (rconfig->remap_off >= 0) {
+	if (rconfig->remap_off != TWL4030_RESCONFIG_UNDEF) {
 		remap &= ~OFF_STATE_MASK;
 		remap |= rconfig->remap_off << OFF_STATE_SHIFT;
 	}
 
-	if (rconfig->remap_sleep >= 0) {
+	if (rconfig->remap_sleep != TWL4030_RESCONFIG_UNDEF) {
 		remap &= ~SLEEP_STATE_MASK;
 		remap |= rconfig->remap_off << SLEEP_STATE_SHIFT;
 	}