mesa: Arrange validate_uniform_parameters parameters to match call sites

mesa: Arrange validate_uniform_parameters parameters to match call sites

Saves a measly 20 bytes on IA32 and nothing on x64.  Depending on
exactly when this is applied, a lot of variation is possible due to
function alignment.

   text	   data	    bss	    dec	    hex	filename
6670131	 228340	  22552	6921023	 699b3f	lib/i965_dri.so before
6670111	 228340	  22552	6921003	 699b2b	lib/i965_dri.so after
6342932	 293872	  29880	6666684	 65b9bc	lib64/i965_dri.so before
6342932	 293872	  29880	6666684	 65b9bc	lib64/i965_dri.so after

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>