xen: arm: Move domain_page.c to MMU specific

domain_page.c is moved to mmu/domain_page.c. The reason
being this file implements MMU specific logic for mapping,
unmapping, etc domain page.

Signed-off-by: Ayan Kumar Halder <ayan.kumar.halder@amd.com>
Reviewed-by: Michal Orzel <michal.orzel@amd.com>

xen/arch/arm/Makefile

@@ -18,7 +18,6 @@ obj-$(CONFIG_IOREQ_SERVER) += dm.o
 obj-$(CONFIG_DOM0LESS_BOOT) += dom0less-build.init.o
 obj-y += domain.o
 obj-y += domain_build.init.o
-obj-$(CONFIG_ARCH_MAP_DOMAIN_PAGE) += domain_page.o
 obj-y += domctl.o
 obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
 obj-y += efi/

xen/arch/arm/mmu/Makefile

@@ -2,3 +2,4 @@ obj-y += p2m.o
 obj-y += pt.o
 obj-y += setup.o
 obj-y += smpboot.o
+obj-$(CONFIG_ARCH_MAP_DOMAIN_PAGE) += domain_page.o