MAINTAINERS: update STAGING - REALTEK RTL8188EU DRIVERS

Commit 55dfa29b ("staging: rtl8188eu: remove rtl8188eu driver from
staging dir") removes ./drivers/staging/rtl8188eu, but misses to adjust
the STAGING - REALTEK RTL8188EU DRIVERS section in MAINTAINERS.

Hence, ./scripts/get_maintainer.pl --self-test=patterns complains:

  no file matches    F:    drivers/staging/rtl8188eu/

A refurnished rtl8188eu driver is available in ./drivers/staging/r8188eu/
and there is no existing section in MAINTAINERS for that directory.

So, reuse the STAGING - REALTEK RTL8188EU DRIVERS section and point to the
refurnished driver with its current developers and maintainers according
to the current git log.
Acked-by: Phillip Potter <phil@philpotter.co.uk>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Link: https://lore.kernel.org/r/20210803071811.8142-1-lukas.bulwahn@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

MAINTAINERS

@@ -17612,8 +17612,9 @@ F:	drivers/staging/olpc_dcon/
 
 STAGING - REALTEK RTL8188EU DRIVERS
 M:	Larry Finger <Larry.Finger@lwfinger.net>
-S:	Odd Fixes
-F:	drivers/staging/rtl8188eu/
+M:	Phillip Potter <phil@philpotter.co.uk>
+S:	Supported
+F:	drivers/staging/r8188eu/
 
 STAGING - REALTEK RTL8712U DRIVERS
 M:	Larry Finger <Larry.Finger@lwfinger.net>