mac80211: Allow selection of TX99 support in ath9k

Add a new config option to enable TX99 support in ath9k.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>

package/kernel/mac80211/Makefile

@@ -239,6 +239,10 @@ define KernelPackage/ath9k/config
 		bool "Support chips used in PC OEM cards"
 		depends on PACKAGE_kmod-ath9k
 
+       config ATH9K_TX99
+               bool "Enable TX99 support"
+               depends on PACKAGE_kmod-ath9k
+
 endef
 
 define KernelPackage/ath9k-htc
@@ -1518,6 +1522,7 @@ config-$(CONFIG_TARGET_ar71xx) += ATH9K_AHB
 config-$(CONFIG_PCI) += ATH9K_PCI
 config-$(CONFIG_ATH_USER_REGD) += ATH_USER_REGD
 config-$(CONFIG_ATH9K_SUPPORT_PCOEM) += ATH9K_PCOEM
+config-$(CONFIG_ATH9K_TX99) += ATH9K_TX99
 
 config-$(call config_package,ath9k-htc) += ATH9K_HTC
 config-$(call config_package,ath10k) += ATH10K ATH10K_PCI