dm: blk: Rename get_dev() to blk_get_dev()

The current name is too generic. Add a 'blk_' prefix to aid searching and
make its purpose clearer.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
diff --git a/common/fb_mmc.c b/common/fb_mmc.c
index fd43085..4324f58 100644
--- a/common/fb_mmc.c
+++ b/common/fb_mmc.c
@@ -106,7 +106,7 @@
 	/* initialize the response buffer */
 	response_str = response;
 
-	dev_desc = get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
+	dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
 	if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
 		error("invalid mmc device\n");
 		fastboot_fail(response_str, "invalid mmc device");
@@ -179,7 +179,7 @@
 	/* initialize the response buffer */
 	response_str = response;
 
-	dev_desc = get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
+	dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
 	if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
 		error("invalid mmc device");
 		fastboot_fail(response_str, "invalid mmc device");