MAINTAINERS: wifi: mark b43 as orphan

There's no maintainer for b43 so mark it as orphan.
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230724104547.3061709-9-kvalo@kernel.org

MAINTAINERS

@@ -3391,7 +3391,7 @@ F:	drivers/media/radio/radio-aztech*
 B43 WIRELESS DRIVER
 L:	linux-wireless@vger.kernel.org
 L:	b43-dev@lists.infradead.org
-S:	Odd Fixes
+S:	Orphan
 W:	https://wireless.wiki.kernel.org/en/users/Drivers/b43
 F:	drivers/net/wireless/broadcom/b43/