drm/msm/dpu: Fix comment typo

The double `be' is duplicated in the comment, remove one.

Signed-off-by: Jason Wang <wangborong@cdjrlc.com>
Fixes: 25fdd593 ("drm/msm: Add SDM845 DPU support")
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/497853/
Link: https://lore.kernel.org/r/20220724204242.4107-1-wangborong@cdjrlc.com


Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>