x86: mach-rdc321x Kconfig fix

The mach-rdc321x uses the leds-gpio driver and explicitely
selects it, this driver also depends on the leds class module,
select it as well.
Signed-off-by: NFlorian Fainelli <florian.fainelli@telecomint.eu>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/Kconfig

@@ -309,6 +309,7 @@ config X86_RDC321X
 	select M486
 	select X86_REBOOTFIXUPS
 	select GENERIC_GPIO
+	select LEDS_CLASS
 	select LEDS_GPIO
 	help
 	  This option is needed for RDC R-321x system-on-chip, also known