libertas: move under marvell vendor directory

Part of reorganising wireless drivers directory and Kconfig.

Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
diff --git a/drivers/net/wireless/Kconfig b/drivers/net/wireless/Kconfig
index d71efe8..b11a2d3 100644
--- a/drivers/net/wireless/Kconfig
+++ b/drivers/net/wireless/Kconfig
@@ -22,6 +22,7 @@
 source "drivers/net/wireless/broadcom/Kconfig"
 source "drivers/net/wireless/cisco/Kconfig"
 source "drivers/net/wireless/intel/Kconfig"
+source "drivers/net/wireless/marvell/Kconfig"
 source "drivers/net/wireless/st/Kconfig"
 
 config PCMCIA_RAYCS
@@ -162,7 +163,6 @@
 
 source "drivers/net/wireless/ath/Kconfig"
 source "drivers/net/wireless/hostap/Kconfig"
-source "drivers/net/wireless/libertas/Kconfig"
 source "drivers/net/wireless/orinoco/Kconfig"
 source "drivers/net/wireless/p54/Kconfig"
 source "drivers/net/wireless/rt2x00/Kconfig"