staging: r8188eu: don't include rtw_led.h from rtw_cmd.h

The rtw_cmd.h does not need any definitions from the led layer, there's
no reason to include rtw_led.h.

When I tried to remove this component

struct led_priv {
   struct adapter *padapter;
   ...

I saw compiler errors because of this chain of include files:
drv_types.h -> rtw_cmd.h -> rtw_led.h

rtw_led.h uses struct adapter before it sees the definiton near the end
of drv_types.h. (It seems that a simple struct adapter * prevents this
problem.)

The best option for fixing this issue is to not include rtw_led.h in
rtw_cmd.h.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
Link: https://lore.kernel.org/r/20221015151115.232095-8-martin@kaiser.cx
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/include/rtw_cmd.h

@@ -6,7 +6,6 @@
 
 #include "wlan_bssdef.h"
 #include "rtw_rf.h"
-#include "rtw_led.h"
 
 #include "osdep_service.h"
 #include "ieee80211.h" /*  <ieee80211/ieee80211.h> */