drm/msm/dpu: drop stale comment from struct dpu_mdp_cfg doc

The field ubwc_static was removed from struct dpu_mdp_cfg some time ago.
Drop the corresponding kerneldoc now.

Fixes: 544d8b96 ("drm/msm/dpu: update UBWC config for sm8150 and sm8250")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/519554/
Link: https://lore.kernel.org/r/20230121135457.2788199-1-dmitry.baryshkov@linaro.orgSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h

@@ -537,7 +537,6 @@ struct dpu_clk_ctrl_reg {
  * @base:              register base offset to mdss
  * @features           bit mask identifying sub-blocks/features
  * @highest_bank_bit:  UBWC parameter
- * @ubwc_static:       ubwc static configuration
  * @ubwc_swizzle:      ubwc default swizzle setting
  * @clk_ctrls          clock control register definition
  */