present: Don't check pixmap pitch in check_flip with non-DC >= 3.34

The current non-DC kernel driver also handles flipping between different
pitches correctly.

Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
12 jobs for amdgpu_present_check_flip-pitch-non-DC in 7 minutes and 6 seconds (queued for 1 minute and 5 seconds)
Status Job ID Name Coverage
  Docker Image
passed #482907
debian-testing

00:00:32

 
  Build
passed #482910
xserver-1.13

00:00:32

passed #482911
xserver-1.14

00:00:30

passed #482912
xserver-1.15

00:00:28

passed #482913
xserver-1.16

00:00:30

passed #482914
xserver-1.17

00:00:41

passed #482915
xserver-1.18

00:00:55

passed #482916
xserver-1.18-clang

00:00:38

passed #482917
xserver-1.19

00:00:29

passed #482918
xserver-1.19-clang

00:00:34

passed #482908
xserver-1.20

00:00:39

passed #482909
xserver-1.20-clang

00:00:33