drm/imagination: Fixed warning due to implicit cast to bool

This line appears to confuse the compiler and had been noticed previously in
clang-tidy output. There isn't anything fundamentally wrong that I can see.
I suspect that it just looks like a mistake - hence the first note.  By making
the second operand an actual bool result, const correctness can be preserved
while silencing the warning.

>> drivers/gpu/drm/imagination/pvr_device_info.c:230:47: warning: use of logical '&&' with constant operand [-Wconstant-logical-operand]
     230 |         } else if (features_size == mapping_max_size && (mapping_max & 63)) {
         |                                                      ^  ~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/imagination/pvr_device_info.c:230:47: note: use '&' for a bitwise operation
     230 |         } else if (features_size == mapping_max_size && (mapping_max & 63)) {
         |                                                      ^~
         |                                                      &
   drivers/gpu/drm/imagination/pvr_device_info.c:230:47: note: remove constant to silence this warning
     230 |         } else if (features_size == mapping_max_size && (mapping_max & 63)) {
         |                                                     ~^~~~~~~~~~~~~~~~~~~~~
   1 warning generated.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202311241752.3iLyyFcA-lkp@intel.com/


Fixes: f99f5f3e ("drm/imagination: Add GPU ID parsing and firmware loading")
Signed-off-by: Donald Robson <donald.robson@imgtec.com>
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231130160017.259902-1-donald.robson@imgtec.com