DMA: shdma: Make sh_dmae_pm static

The structure isn't used outside of its compilation unit. Make it
static.

Cc: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: dmaengine@vger.kernel.org
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
diff --git a/drivers/dma/sh/shdmac.c b/drivers/dma/sh/shdmac.c
index 2150987..dda7e75 100644
--- a/drivers/dma/sh/shdmac.c
+++ b/drivers/dma/sh/shdmac.c
@@ -639,7 +639,7 @@
 #define sh_dmae_resume NULL
 #endif
 
-const struct dev_pm_ops sh_dmae_pm = {
+static const struct dev_pm_ops sh_dmae_pm = {
 	.suspend		= sh_dmae_suspend,
 	.resume			= sh_dmae_resume,
 	.runtime_suspend	= sh_dmae_runtime_suspend,