efi_loader: correct EFI_RUNTIME_SERVICES_SIGNATURE

The value for EFI_RUNTIME_SERVICES_SIGNATURE does not match the
UEFI spec 2.7.

Reported-by: Takahiro Akashi <takahiro.akashi@linaro.org>
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

include/efi_api.h

@@ -189,7 +189,7 @@ enum efi_reset_type {
 };
 
 /* EFI Runtime Services table */
-#define EFI_RUNTIME_SERVICES_SIGNATURE	0x5652453544e5552ULL
+#define EFI_RUNTIME_SERVICES_SIGNATURE	0x56524553544e5552ULL
 
 #define CAPSULE_FLAGS_PERSIST_ACROSS_RESET	0x00010000
 #define CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE	0x00020000