drm/msm: dpu: Include dpu_io_util.h directly in dpu_kms.h

It's needed for struct dss_module_power, and is currently being pulled
in by dpu_power_handle.h

Changes in v2:
- None
Reviewed-by: Jeykumar Sankaran <jsanka@codeaurora.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h

@@ -29,6 +29,7 @@
 #include "dpu_hw_lm.h"
 #include "dpu_hw_interrupts.h"
 #include "dpu_hw_top.h"
+#include "dpu_io_util.h"
 #include "dpu_rm.h"
 #include "dpu_power_handle.h"
 #include "dpu_irq.h"