anv/cmd_buffer: Remove the 1-D case from the HiZ QPitch calculation

anv/cmd_buffer: Remove the 1-D case from the HiZ QPitch calculation

The 1-D special case doesn't actually apply to depth or HiZ.  I discovered
this while converting BLORP over to genxml and ISL.  The reason is that the
1-D special case only applies to the new Sky Lake 1-D layout which is only
used for LINEAR 1-D images.  For tiled 1-D images, such as depth buffers,
the old gen4 2-D layout is used and the QPitch should be in rows.

Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
Cc: "13.0" <mesa-stable@lists.freedesktop.org>