dmaengine: ste_dma40: Declare memcpy config as static

Fix sparse warnings:

drivers/dma/ste_dma40.c:81:26: warning: symbol 'dma40_memcpy_conf_phy' was not declared. Should it be static?
drivers/dma/ste_dma40.c:95:26: warning: symbol 'dma40_memcpy_conf_log' was not declared. Should it be static?

Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/dma/ste_dma40.c

@@ -78,7 +78,7 @@ static int dma40_memcpy_channels[] = {
 };
 
 /* Default configuration for physcial memcpy */
-struct stedma40_chan_cfg dma40_memcpy_conf_phy = {
+static struct stedma40_chan_cfg dma40_memcpy_conf_phy = {
 	.mode = STEDMA40_MODE_PHYSICAL,
 	.dir = DMA_MEM_TO_MEM,
 
@@ -92,7 +92,7 @@ struct stedma40_chan_cfg dma40_memcpy_conf_phy = {
 };
 
 /* Default configuration for logical memcpy */
-struct stedma40_chan_cfg dma40_memcpy_conf_log = {
+static struct stedma40_chan_cfg dma40_memcpy_conf_log = {
 	.mode = STEDMA40_MODE_LOGICAL,
 	.dir = DMA_MEM_TO_MEM,