mac80211: ath9k: enable OEM cards support on x86

A lot of devices running OpenWrt x86 arch (32 or 64 bit) are either
"home-made routers" or devices that use PC class OEM components.

This commit enables OEM cards support on those devices by default.

Signed-off-by: Rafał Dzięgiel <[email protected]>
[reformat commit message]
Signed-off-by: David Bauer <[email protected]>

package/kernel/mac80211/ath.mk

@@ -218,6 +218,7 @@ define KernelPackage/ath9k/config
 	config ATH9K_SUPPORT_PCOEM
 		bool "Support chips used in PC OEM cards"
 		depends on PACKAGE_kmod-ath9k
+		default y if (x86_64 || i386)
 
        config ATH9K_TX99
                bool "Enable TX99 support (WARNING: testing only, breaks normal operation!)"