drm/msm/dpu: Clear perf params before calculating bw

To prevent incorrect BW calculation, zero out dpu_core_perf_params
before it is passed into dpu_core_perf_aggregate().

Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Fixes: 795aef6 ("drm/msm/dpu: remove duplicate code calculating sum of bandwidths")
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/641278/
Signed-off-by: Rob Clark <robdclark@chromium.org>

Author: Jessica Zhang

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

@@ -164,7 +164,7 @@ int dpu_core_perf_crtc_check(struct drm_crtc *crtc,
 	u32 bw, threshold;
 	struct dpu_crtc_state *dpu_cstate;
 	struct dpu_kms *kms;
-	struct dpu_core_perf_params perf;
+	struct dpu_core_perf_params perf = { 0 };
 
 	if (!crtc || !state) {
 		DPU_ERROR("invalid crtc\n");