RAS: ras_common: Add null pointer check for error record probe function

Add a null pointer check for the error record probe
function -- avoids a panic in case a platform has not defined it.

Change-Id: I1139fa0df33297a12ec16615cacd07540925f991
Signed-off-by: Sughosh Ganu <sughosh.ganu@arm.com>
1 file changed