x86/intel config: Fix the APB_TIMER selection

Seems Kconfig SELECT isn't selecting things hierarchically when
selected.

config APB_TIMER
       def_bool y if X86_INTEL_MID
       prompt "Intel MID APB Timer Support" if X86_INTEL_MID
       select DW_APB_TIMER
       depends on X86_INTEL_MID && SFI

when we select APB_TIMER doesn't select DW_APB_TIMER so do it by
hand.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Link: http://lkml.kernel.org/n/tip-kpnaimplltk6d1lolusqj3ae@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/Kconfig

@@ -409,12 +409,14 @@ config X86_MRST
 	depends on PCI
 	depends on PCI_GOANY
 	depends on X86_IO_APIC
+	select X86_INTEL_MID
+	select SFI
+	select DW_APB_TIMER
 	select APB_TIMER
 	select I2C
 	select SPI
 	select INTEL_SCU_IPC
 	select X86_PLATFORM_DEVICES
-	select X86_INTEL_MID
 	---help---
 	  Moorestown is Intel's Low Power Intel Architecture (LPIA) based Moblin
 	  Internet Device(MID) platform. Moorestown consists of two chips:
@@ -428,12 +430,14 @@ config X86_MDFLD
 	depends on PCI
 	depends on PCI_GOANY
 	depends on X86_IO_APIC
+	select X86_INTEL_MID
+	select SFI
+	select DW_APB_TIMER
 	select APB_TIMER
 	select I2C
 	select SPI
 	select INTEL_SCU_IPC
 	select X86_PLATFORM_DEVICES
-	select X86_INTEL_MID
 	---help---
 	  Medfield is Intel's Low Power Intel Architecture (LPIA) based Moblin
 	  Internet Device(MID) platform.