drm/nouveau/mc: bracket interrupt handler with NV_PMC_INTR_EN disable/re-enable
drm/nouveau/mc: bracket interrupt handler with NV_PMC_INTR_EN disable/re-enable

This looks to be what NVIDIA do pretty much everywhere, since forever.

Signed-off-by: Ben Skeggs <d9f27fb07c1e9f131223ad827fa5179f3846c30b@redhat.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs