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: caa714f8 ("drm/tests: helpers: Add helper for drm_display_mode_from_cea_vic()")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202501032001.O6WY1VCW-lkp@intel.com/


Reviewed-by: Kuan-Wei Chiu <visitorckw@gmail.com>
Tested-by: Kuan-Wei Chiu <visitorckw@gmail.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Yu-Chun Lin <eleanor15x@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250104165134.1695864-1-eleanor15x@gmail.com


Signed-off-by: Maxime Ripard <mripard@kernel.org>