lib: Don't call igt_require_fb_modifiers() when no modifier

vmwgfx and amdgpu doesn't support fb modifiers, yet kms_addfb() requires
modifier support. Since many tests don't need this to run, the
requirement can be made less broad.

Therefore, tighten the requirement to cases where modifiers are actually
needed.

v2:
* In create_fb() calls to kms_addfb(), remove the modifier flag iff the
  driver doesn't support modifiers and the modifer is 0
* Don't modify the flag in kms_addfb().

Signed-off-by: Deepak Rawat <drawat@vmware.com>
Signed-off-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

0 files changed, 0 insertions, 0 deletions