drm/tests: helpers: Fix compiler warning

Delete one line break to make the format correct, resolving the
following warning during a W=1 build:

>> drivers/gpu/drm/tests/drm_kunit_helpers.c:324: warning: bad line: for a KUnit test

Fixes: caa714f86699 ("drm/tests: helpers: Add helper for drm_display_mode_from_cea_vic()")
Reported-by: kernel test robot <[e-mail]>
Closes: https://lore.kernel.org/oe-kbuild-all/[e-mail]/
Reviewed-by: Kuan-Wei Chiu <[e-mail]>
Tested-by: Kuan-Wei Chiu <[e-mail]>
Reviewed-by: Dmitry Baryshkov <[e-mail]>
Signed-off-by: Yu-Chun Lin <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]
Signed-off-by: Maxime Ripard <[e-mail]>

drivers/gpu/drm/tests/drm_kunit_helpers.c

···
 }
 
 /**
- * drm_kunit_display_mode_from_cea_vic() - return a mode for CEA VIC
-					   for a KUnit test
+ * drm_kunit_display_mode_from_cea_vic() - return a mode for CEA VIC for a KUnit test
  * @test: The test context object
  * @dev: DRM device
  * @video_code: CEA VIC of the mode