drm/msm: Fix fb plane offset calculation

The offset got dropped by accident.

Fixes: d413e6f9 ("drm/msm: Drop msm_gem_iova()")
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Tested-by: Stephen Boyd <swboyd@chromium.org> # CoachZ
Link: https://lore.kernel.org/r/20220510165216.3577068-1-robdclark@gmail.comSigned-off-by: Rob Clark <robdclark@chromium.org>

drivers/gpu/drm/msm/msm_fb.c

@@ -118,7 +118,7 @@ uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb,
 		struct msm_gem_address_space *aspace, int plane)
 {
 	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
-	return msm_fb->iova[plane];
+	return msm_fb->iova[plane] + fb->offsets[plane];
 }
 
 struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane)