brcmfmac: select 802.11ac support

Signed-off-by: Felix Fietkau <nbd@nbd.name>

package/kernel/mac80211/Makefile

@@ -686,7 +686,7 @@ define KernelPackage/brcmfmac
   $(call KernelPackage/mac80211/Default)
   TITLE:=Broadcom IEEE802.11n USB FullMAC WLAN driver
   URL:=https://wireless.wiki.kernel.org/en/users/drivers/brcm80211
-  DEPENDS+= @USB_SUPPORT +kmod-cfg80211 +@DRIVER_11N_SUPPORT +kmod-brcmutil \
+  DEPENDS+= @USB_SUPPORT +kmod-cfg80211 +@DRIVER_11N_SUPPORT +@DRIVER_11AC_SUPPORT +kmod-brcmutil \
 	+BRCMFMAC_SDIO:kmod-mmc \
 	+BRCMFMAC_USB:kmod-usb-core +BRCMFMAC_USB:brcmfmac-firmware-usb
   FILES:=$(PKG_BUILD_DIR)/drivers/net/wireless/broadcom/brcm80211/brcmfmac/brcmfmac.ko