intel/isl: Allow creation of 1-D compressed textures

intel/isl: Allow creation of 1-D compressed textures

Compressed 1-D textures are not well-defined thing in either GL or Vulkan.
However, auxiliary surfaces are treated as compressed textures in ISL and
we can do HiZ and CCS with 1-D so we need to be able to create them.  In
order to prevent actually using them (the docs say no), we assert in the
state setup code.

Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>