efi: sysfb_efi: Replace open coded swap with the macro

Replace the open coded width height swap with the standard macro.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
Suggested-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Melissa Wen <mwen@igalia.com>
Cc: linux-efi@vger.kernel.org
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Tested-by: Melissa Wen <mwen@igalia.com> # v3
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

Author: Tvrtko Ursulin

drivers/firmware/efi/sysfb_efi.c

@@ -357,10 +357,7 @@ __init void sysfb_apply_efi_quirks(void)
 
 	if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI &&
 	    dmi_check_system(efifb_dmi_swap_width_height)) {
-		u16 temp = screen_info.lfb_width;
-
-		screen_info.lfb_width = screen_info.lfb_height;
-		screen_info.lfb_height = temp;
+		swap(screen_info.lfb_width, screen_info.lfb_height);
 		screen_info.lfb_linelength = 4 * screen_info.lfb_width;
 	}
 }