x86/EFI: Properly init-annotate BGRT code

These items are only ever referenced from initialization code.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Cc: <mjg@redhat.com>
Link: http://lkml.kernel.org/r/50AFB29F02000078000AAE8E@nat28.tlf.novell.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

arch/x86/platform/efi/efi-bgrt.c

@@ -11,20 +11,21 @@
  * published by the Free Software Foundation.
  */
 #include <linux/kernel.h>
+#include <linux/init.h>
 #include <linux/acpi.h>
 #include <linux/efi.h>
 #include <linux/efi-bgrt.h>
 
 struct acpi_table_bgrt *bgrt_tab;
-void *bgrt_image;
-size_t bgrt_image_size;
+void *__initdata bgrt_image;
+size_t __initdata bgrt_image_size;
 
 struct bmp_header {
 	u16 id;
 	u32 size;
 } __packed;
 
-void efi_bgrt_init(void)
+void __init efi_bgrt_init(void)
 {
 	acpi_status status;
 	void __iomem *image;