msm: kgsl: Issue conditional interrupts on internal submissions

Waittimestamp calls require interrupts to check if a timestamp
has passed.  The lack of these interrupts was causing waittimestamp
to wait longer than expected since the interrupts were less frequent.
Cause the conditional interrupts to be issued faster by allowing
internal command submissions to issue them.

CRs-fixed: 417577
Change-Id: Idb6f18261b3dd6fcbea5607d449d70ca54136e81
Signed-off-by: Carter Cooper <ccooper@codeaurora.org>