b43: make HT-PHY support experimental

It was tested on three BCM4331 devices, code has been written from MMIO
dumps only, but seems to be quite stable.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/b43/Kconfig

@@ -124,12 +124,12 @@ config B43_PHY_LP
 	  (802.11a support is optional, and currently disabled).
 
 config B43_PHY_HT
-	bool "Support for HT-PHY devices (BROKEN)"
-	depends on B43 && BROKEN
+	bool "Support for HT-PHY (high throughput) devices (EXPERIMENTAL)"
+	depends on B43 && EXPERIMENTAL
 	---help---
 	  Support for the HT-PHY.
 
-	  Say N, this is BROKEN and crashes driver.
+	  Enables support for BCM4331 and possibly other chipsets with that PHY.
 
 config B43_PHY_LCN
 	bool "Support for LCN-PHY devices (BROKEN)"