drm/msm/dsi: fix off by one in dsi_bus_clk_enable error handling

This disables a lock which wasn't enabled and it does not disable
the first lock in the array.

Fixes: 6e0eb52 ("drm/msm/dsi: Parse bus clocks from a list")
Signed-off-by: Dan Carpenter <[email protected]>
Reviewed-by: Dmitry Baryshkov <[email protected]>
Link: https://lore.kernel.org/r/20211001123409.GG2283@kili
Signed-off-by: Dmitry Baryshkov <[email protected]>
Signed-off-by: Rob Clark <[email protected]>

Author: Dan Carpenter

drivers/gpu/drm/msm/dsi/dsi_host.c

@@ -451,7 +451,7 @@ static int dsi_bus_clk_enable(struct msm_dsi_host *msm_host)
 
 	return 0;
 err:
-	for (; i > 0; i--)
+	while (--i >= 0)
 		clk_disable_unprepare(msm_host->bus_clks[i]);
 
 	return ret;