mesa: fix ARRAY_SIZE query for GetProgramResourceiv

mesa: fix ARRAY_SIZE query for GetProgramResourceiv

Patch also refactors name length queries which were using array size
in computation, this has to be done in same time to avoid regression in
arb_program_interface_query-resource-query Piglit test.

Fixes rest of the failures with
   ES31-CTS.program_interface_query.no-locations

v2: make additional check only for GS inputs
v3: create helper function for resource name length
    so that it gets calculated only in one place

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Martin Peres <martin.peres@linux.intel.com>