[PATCH 0/2] drm: Fix 8bpp fbcon on i915

[ville.syrjala at linux.intel.com]

Looks like I accidentally broke 8bpp support in i915.

This series fixes the regression, as verified in the bug report:
https://bugs.freedesktop.org/show_bug.cgi?id=59572#c18

There should be no negative effect on other drivers since they either
don't support 8bpp, or they don't bother with checking the pixel
format.