msm: sde: delimit the va_arg list in smmu fault handler

Rotator SMMU fault handler was not providing the necessary
delimiter to the dump handler to signify the end of the variable
argument list. Use the macro for dumping logs which adds the correct
delimiter instead of calling the dump handler directly.  This will
prevent any possibility of dereferencing an invalid pointer when
processing data in the variable argument list.

Change-Id: I5bd84768c47c4bc750842f4a21bff72b7c7f9366
Signed-off-by: Steve Cohen <cohens@codeaurora.org>