MAINTAINERS: wifi: mark wl3501 as orphan

There's no maintainer for this driver so mark it as orphan.
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230724104547.3061709-7-kvalo@kernel.org

MAINTAINERS

@@ -22938,7 +22938,7 @@ F:	drivers/input/misc/wistron_btns.c
 
 WL3501 WIRELESS PCMCIA CARD DRIVER
 L:	linux-wireless@vger.kernel.org
-S:	Odd fixes
+S:	Orphan
 F:	drivers/net/wireless/legacy/wl3501*
 
 WMI BINARY MOF DRIVER