lib/igt_fb: fix igt_create_fb_with_bo_size() documentation
lib/igt_fb: fix igt_create_fb_with_bo_size() documentation

If we pass zero as the bo_size we won't get the minimum needed size,
we'll just get a size that works. The size is decided by
create_bo_for_fb(). The selected size is really not minimal for tiled
objects.

We'll implement support for minimum size later.

Signed-off-by: Paulo Zanoni <cc0e04a2103c45cd195651d976f79813d0f66bdf@intel.com>

tiagovignatti/intel-gpu-tools,tiagovignatti/intel-gpu-tools,tiagovignatti/intel-gpu-tools,tiagovignatti/intel-gpu-tools