prism54: move under intersil vendor directory

Part of reorganising wireless drivers directory and Kconfig.

Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index 53c15af..2c41981 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8498,7 +8498,7 @@
 L:	linux-wireless@vger.kernel.org
 W:	http://wireless.kernel.org/en/users/Drivers/p54
 S:	Obsolete
-F:	drivers/net/wireless/prism54/
+F:	drivers/net/wireless/intersil/prism54/
 
 PS3 NETWORK SUPPORT
 M:	Geoff Levand <geoff@infradead.org>