i965/skl: Fix the qpitch value

i965/skl: Fix the qpitch value

On Skylake the qpitch value is uploaded as part of the surface state
so we don't need to add the extra rows that are done for other
generations. However for 3D textures it needs to be aligned to the
tile height and for depth/stencil textures it needs to be a multiple
of 8. Unlike previous generations the qpitch is measured as a multiple
of the block size for compressed surfaces. When the horizontal mipmap
layout is used for 1D textures then the qpitch is measured in pixels
instead of rows.

v2: Align the depth/stencil textures to a multiple of 8
v3: Add an assert that ALL_SLICES_AT_EACH_LOD is not used. Ignore the
    vertical alignment when picking the qpitch for 1D_ARRAY textures.

Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>