arch/Kconfig: remove virtual memory allocator dependency from MM_SHM

The dependency should be vice versa; the MM_SHM should depend on the
existence of the virtual memory range allocator.

Create a new CONFIG flag CONFIG_ARCH_VMA_MAPPING, which will define that
there is a virtual memory range allocator. Make MM_SHM select that flag

Signed-off-by: Jukka Laitinen <jukkax@ssrc.tii.ae>

mm/Kconfig

@@ -162,6 +162,7 @@ config MM_SHM
 	bool "Shared memory support"
 	default n
 	depends on MM_PGALLOC && BUILD_KERNEL
+	select ARCH_VMA_MAPPING
 	---help---
 		Build in support for the shared memory interfaces shmget(), shmat(),
 		shmctl(), and shmdt().