drm/nouveau/fifo/nvc0: improve interrupt handler somewhat

Logs extra info for interrupts that have a sub-status register, and
handles the "special" ack from INTR bit 31.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2013-01-31 19:49:33 -05:00
commit 32256c87ea