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/include/dm/device.h b/include/dm/device.h
index e16ba24..6899030 100644
--- a/include/dm/device.h
+++ b/include/dm/device.h
@@ -335,7 +335,7 @@
 	ll_entry_declare(struct driver, __name, driver)
 
 /* Get a pointer to a given driver */
-#define DM_GET_DRIVER(__name)						\
+#define DM_DRIVER_GET(__name)						\
 	ll_entry_get(struct driver, __name, driver)
 
 /**