arm64/efi: move EFI_PAGE definitions to efi/memory.h

The EFI page definitions and macros are generic and should not be confined
to arm64 headers - so move to efi/memory.h.
Also add EFI_PAGE_SIZE macro.

Update loader sources to reflect new header location.

Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>

grub-core/loader/arm64/linux.c

@@ -28,6 +28,7 @@
 #include <grub/cpu/linux.h>
 #include <grub/efi/efi.h>
 #include <grub/efi/fdtload.h>
+#include <grub/efi/memory.h>
 #include <grub/efi/pe32.h>
 #include <grub/i18n.h>
 #include <grub/lib/cmdline.h>

grub-core/loader/arm64/xen_boot.c

@@ -30,6 +30,7 @@
 #include <grub/cpu/linux.h>
 #include <grub/efi/efi.h>
 #include <grub/efi/fdtload.h>
+#include <grub/efi/memory.h>
 #include <grub/efi/pe32.h>	/* required by struct xen_hypervisor_header */
 #include <grub/i18n.h>
 #include <grub/lib/cmdline.h>

grub-core/loader/efi/fdt.c

@@ -24,6 +24,7 @@
 #include <grub/file.h>
 #include <grub/efi/efi.h>
 #include <grub/efi/fdtload.h>
+#include <grub/efi/memory.h>
 
 static void *loaded_fdt;
 static void *fdt;