drm/msm/dpu: fix unitialized variable error

drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c:817 dpu_crtc_enable() error: uninitialized symbol 'request_bandwidth'.

Reported-by: kernel test robot <[e-mail]>
Signed-off-by: Rob Clark <[e-mail]>
Reviewed-by: Sean Paul <[e-mail]>
Signed-off-by: Rob Clark <[e-mail]>

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

···
 {
 	struct dpu_crtc *dpu_crtc;
 	struct drm_encoder *encoder;
-	bool request_bandwidth;
+	bool request_bandwidth = false;
 
 	if (!crtc) {
 		DPU_ERROR("invalid crtc\n");