ARM: pxa: fix build issue on cm-x300

arch/arm/mach-pxa/cm-x300.c:716:3: error: unknown field ‘dev’ specified
in initializer
make[1]: *** [arch/arm/mach-pxa/cm-x300.o] Error 1
make: *** [arch/arm/mach-pxa] Error 2

It's caused by 'dev' field removed from struct
regulator_consumer_supply.
Signed-off-by: NHaojian Zhuang <haojian.zhuang@gmail.com>

arch/arm/mach-pxa/cm-x300.c

@@ -713,7 +713,6 @@ struct da9030_battery_info cm_x300_battery_info = {
 
 static struct regulator_consumer_supply buck2_consumers[] = {
 	{
-		.dev = NULL,
 		.supply = "vcc_core",
 	},
 };