efi_loader: Fix efi_add_runtime_mmio definition

The efi_add_runtime_mmio prototype for disabled CONFIG_EFI_LOADER
was different from the enabled one. Sync them.
Signed-off-by: NAlexander Graf <agraf@suse.de>

include/efi_loader.h

@@ -181,7 +181,7 @@ void efi_get_time_init(void);
 /* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
 #define __efi_runtime_data
 #define __efi_runtime
-static inline void efi_add_runtime_mmio(void **mmio_ptr, u64 len) { }
+static inline void efi_add_runtime_mmio(void *mmio_ptr, u64 len) { }
 
 /* No loader configured, stub out EFI_ENTRY */
 static inline void efi_restore_gd(void) { }