drm/msm/mdp4: correct LCDC regulator name

Correct c&p error from the conversion of LCDC regulators to the bulk
API.

Fixes: 54f1fbc ("drm/msm/mdp4: use bulk regulators API for LCDC encoder")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/590412/
Link: https://lore.kernel.org/r/20240420-mdp4-fixes-v1-3-96a70f64fa85@linaro.org

Author: lumag

drivers/gpu/drm/msm/disp/mdp4/mdp4_lcdc_encoder.c

@@ -389,7 +389,7 @@ struct drm_encoder *mdp4_lcdc_encoder_init(struct drm_device *dev,
 
 	/* TODO: different regulators in other cases? */
 	mdp4_lcdc_encoder->regs[0].supply = "lvds-vccs-3p3v";
-	mdp4_lcdc_encoder->regs[1].supply = "lvds-vccs-3p3v";
+	mdp4_lcdc_encoder->regs[1].supply = "lvds-pll-vdda";
 	mdp4_lcdc_encoder->regs[2].supply = "lvds-vdda";
 
 	ret = devm_regulator_bulk_get(dev->dev,