staging: rtl8723bs: remove typedefs in drv_types.h

This commit fixes the following checkpatch.pl warning:

    WARNING: do not add new typedefs
    torvalds#374: FILE: include/drv_types.h:374:
    +typedef enum _DRIVER_STATE {

Signed-off-by: Marco Cesati <marco.cesati@gmail.com>
Link: https://lore.kernel.org/r/20210312082638.25512-13-marco.cesati@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723bs/include/drv_types.h

@@ -371,11 +371,11 @@ enum ADAPTER_TYPE {
 	MAX_ADAPTER = 0xFF,
 };
 
-typedef enum _DRIVER_STATE {
+enum DRIVER_STATE {
 	DRIVER_NORMAL = 0,
 	DRIVER_DISAPPEAR = 1,
 	DRIVER_REPLACE_DONGLE = 2,
-} DRIVER_STATE;
+};
 
 struct adapter {
 	int	DriverState;/*  for disable driver using module, use dongle to replace module. */