x86/intel_mid: Fix the Kconfig for MID selection

We currently fail to build on CONFIG_X86_INTEL_MID=y and
CONFIG_X86_MRST unset.

We could build all the bits to make generic MID work if you
picked MID platform alone but that's really silly. Instead use
select and two variables.

This looks a bit daft right now but once we add a Medfield
selection it'll start to look a good deal more sensible.

Reported-by: Ingo Molnar <mingo@elte.hu>
Reported-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Link: http://lkml.kernel.org/r/20111205231433.28811.51297.stgit@bob.linux.org.uk
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/Kconfig

@@ -390,7 +390,7 @@ config X86_INTEL_CE
 	  This option compiles in support for the CE4100 SOC for settop
 	  boxes and media devices.
 
-config X86_INTEL_MID
+config X86_WANT_INTEL_MID
 	bool "Intel MID platform support"
 	depends on X86_32
 	depends on X86_EXTENDED_PLATFORM
@@ -399,7 +399,7 @@ config X86_INTEL_MID
 	  systems which do not have the PCI legacy interfaces (Moorestown,
 	  Medfield). If you are building for a PC class system say N here.
 
-if X86_INTEL_MID
+if X86_WANT_INTEL_MID
 
 config X86_MRST
        bool "Moorestown MID platform"
@@ -411,6 +411,7 @@ config X86_MRST
 	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: