dm: Rename DM_GET_DRIVER() to DM_DRIVER_GET()

In the spirit of using the same base name for all of these related macros,
rename this to have the operation at the end. This is not widely used so
the impact is fairly small.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/mtd/nand/raw/pxa3xx_nand.c b/drivers/mtd/nand/raw/pxa3xx_nand.c
index e923ce3..f623375 100644
--- a/drivers/mtd/nand/raw/pxa3xx_nand.c
+++ b/drivers/mtd/nand/raw/pxa3xx_nand.c
@@ -1947,7 +1947,7 @@
 	int ret;
 
 	ret = uclass_get_device_by_driver(UCLASS_MTD,
-			DM_GET_DRIVER(pxa3xx_nand), &dev);
+			DM_DRIVER_GET(pxa3xx_nand), &dev);
 	if (ret && ret != -ENODEV) {
 		pr_err("Failed to initialize %s. (error %d)\n", dev->name,
 			   ret);