intel/fs: use nomask for setting cr0 for float controls

intel/fs: use nomask for setting cr0 for float controls

The instructions manipulation cr0 use the default mask on lane0. So if
for some reason that lane is disabled in some of the dispatchs, we can
end up not executing the instructions.

Fixes flakyness in dEQP-VK.spirv_assembly.instruction.graphics.16bit_storage.uniform_float_32_to_16.uniform_matrix_float_rtz_frag

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: mesa-stable
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Francisco Jerez <currojerez@riseup.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22314>