drm/i915: Mark expected switch fall-throughs
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.
Addresses-Coverity-ID: 141432
Addresses-Coverity-ID: 141433
Addresses-Coverity-ID: 141434
Addresses-Coverity-ID: 141435
Addresses-Coverity-ID: 141436
Addresses-Coverity-ID:
1357360
Addresses-Coverity-ID:
1357403
Addresses-Coverity-ID:
1357433
Addresses-Coverity-ID:
1392622
Addresses-Coverity-ID:
1415273
Addresses-Coverity-ID:
1435752
Addresses-Coverity-ID:
1441500
Addresses-Coverity-ID:
1454596
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180628223541.GA17665@embeddedor.com