arm: Add return value argument to longjmp

The normal longjmp command allows for a caller to pass the return value
of the setjmp() invocation. This patch adds that semantic to the arm
implementation of it and adjusts the efi_loader call respectively.

Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index be6f5e8..792db39 100644
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -475,7 +475,7 @@
 		  exit_data_size, exit_data);
 
 	loaded_image_info->exit_status = exit_status;
-	longjmp(&loaded_image_info->exit_jmp);
+	longjmp(&loaded_image_info->exit_jmp, 1);
 
 	panic("EFI application exited");
 }