drm/fourcc: 64 #defines need ULL postfix

I have no idea about the exact rules, but this angered Dave's 32bit
rhel gcc.
Reported-by: NDave Airlie <airlied@gmail.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>

include/uapi/drm/drm_fourcc.h

@@ -151,7 +151,7 @@
 /* add more to the end as needed */
 
 #define fourcc_mod_code(vendor, val) \
-	((((u64)DRM_FORMAT_MOD_VENDOR_## vendor) << 56) | (val & 0x00ffffffffffffffL))
+	((((u64)DRM_FORMAT_MOD_VENDOR_## vendor) << 56) | (val & 0x00ffffffffffffffULL))
 
 /*
  * Format Modifier tokens: