drm/radeon: make rv770_set_sw_state failures non-fatal
drm/radeon: make rv770_set_sw_state failures non-fatal

On some cards it takes a relatively long time for the change
to take place.  Make a timeout non-fatal.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=76130

Signed-off-by: Alex Deucher <08dc22c6156113f2deff178e35e3ed9b24d6af9e@amd.com>
Cc: 4fbacc2fa0ffdbb11bf1ad6925b886ebd08dd15f@vger.kernel.org

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs