msm_fb: display: update var in display commit

Need the value of var in display commit to update the double buffers.
If not, double buffering doesn't work in minui (eg. recovery and off-charger
mode)

Change-Id: I1fba52243cc781f18742131759245911d32c9b18

drivers/video/msm/msm_fb.c

@@ -1903,6 +1903,7 @@ static int msm_fb_pan_display(struct fb_var_screeninfo *var,
 {
 	struct mdp_display_commit disp_commit;
 	memset(&disp_commit, 0, sizeof(disp_commit));
+	disp_commit.var = *var;
 	disp_commit.wait_for_finish = TRUE;
 	return msm_fb_pan_display_ex(info, &disp_commit);
 }