wl12xx: add driver

wl12xx is a driver for TI wl1251 802.11 chipset designed for embedded
devices, supporting both SDIO and SPI busses. Currently the driver
supports only SPI. Adding support 1253 (the 5 GHz version) should be
relatively easy. More information here:

http://focus.ti.com/general/docs/wtbu/wtbuproductcontent.tsp?contentId=4711&navigationId=12494&templateId=6123

(Collapsed original sequence of pre-merge patches into single commit for
initial merge. -- JWL)

Signed-off-by: Kalle Valo <kalle.valo@nokia.com>
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/wl12xx/Kconfig b/drivers/net/wireless/wl12xx/Kconfig
new file mode 100644
index 0000000..20a9633
--- /dev/null
+++ b/drivers/net/wireless/wl12xx/Kconfig
@@ -0,0 +1,11 @@
+config WL12XX
+	tristate "TI wl1251/wl1271 support"
+	depends on MAC80211 && WLAN_80211 && SPI_MASTER && EXPERIMENTAL
+	select FW_LOADER
+	select CRC7
+	---help---
+	  This module adds support for wireless adapters based on
+	  TI wl1251/wl1271 chipsets.
+
+	  If you choose to build a module, it'll be called wl12xx. Say N if
+	  unsure.