drm/msm/dpu: sc7180: add missing WB2 clock control

Add missing DPU_CLK_CTRL_WB2 to sc7180_mdp clocks array.

Fixes: 51e4d60e ("drm/msm/dpu: add writeback support for sc7180")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Tested-by: Jessica Zhang <quic_jesszhan@quicinc.com> # Trogdor (sc7180)
Patchwork: https://patchwork.freedesktop.org/patch/518504/
Link: https://lore.kernel.org/r/20230116103055.780767-1-dmitry.baryshkov@linaro.orgSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

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

@@ -546,6 +546,8 @@ static const struct dpu_mdp_cfg sc7180_mdp[] = {
 		.reg_off = 0x2B4, .bit_off = 8},
 	.clk_ctrls[DPU_CLK_CTRL_CURSOR1] = {
 		.reg_off = 0x2C4, .bit_off = 8},
+	.clk_ctrls[DPU_CLK_CTRL_WB2] = {
+		.reg_off = 0x3B8, .bit_off = 24},
 	},
 };