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/uclass.h b/include/dm/uclass.h
index f06339e..b5f066d 100644
--- a/include/dm/uclass.h
+++ b/include/dm/uclass.h
@@ -264,7 +264,7 @@
  * uclass_get_device_by_driver() - Get a uclass device for a driver
  *
  * This searches the devices in the uclass for one that uses the given
- * driver. Use DM_GET_DRIVER(name) for the @drv argument, where 'name' is
+ * driver. Use DM_DRIVER_GET(name) for the @drv argument, where 'name' is
  * the driver name - as used in U_BOOT_DRIVER(name).
  *
  * The device is probed to activate it ready for use.