fix wifi shellscript syntax errors/typos

package/kernel/mac80211/Makefile

@@ -11,7 +11,7 @@ include $(INCLUDE_DIR)/kernel.mk
 PKG_NAME:=mac80211
 
 PKG_VERSION:=2017-01-31
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 PKG_SOURCE_URL:=http://mirror2.openwrt.org/sources
 PKG_BACKPORT_VERSION:=
 PKG_HASH:=75e6d39e34cf156212a2509172a4a62b673b69eb4a1d9aaa565f7fa719fa2317
@@ -1576,7 +1576,7 @@ config-$(call config_package,brcmfmac) += BRCMFMAC
 config-$(CONFIG_BRCMFMAC_SDIO) += BRCMFMAC_SDIO
 config-$(CONFIG_BRCMFMAC_USB) += BRCMFMAC_USB
 config-$(CONFIG_BRCMFMAC_PCIE) += BRCMFMAC_PCIE
-config-$(CONFIG_PACKAGE_BRCM80211_DEBUG) += BRCMDBG BRCM_TRACING
+config-$(CONFIG_PACKAGE_BRCM80211_DEBUG) += BRCMDBG
 
 config-$(call config_package,mac80211-hwsim) += MAC80211_HWSIM
 config-$(call config_package,mt7601u) += MT7601U

package/kernel/mac80211/files/lib/wifi/mac80211.sh

@@ -92,7 +92,7 @@ detect_mac80211() {
 			htmode="VHT80"
 		}
 
-		[ -n $htmode ] && ht_capab="set wireless.radio${devidx}.htmode=$htmode"
+		[ -n "$htmode" ] && ht_capab="set wireless.radio${devidx}.htmode=$htmode"
 
 		if [ -x /usr/bin/readlink -a -h /sys/class/ieee80211/${dev} ]; then
 			path="$(readlink -f /sys/class/ieee80211/${dev}/device)"
@@ -116,7 +116,6 @@ detect_mac80211() {
 			set wireless.radio${devidx}.hwmode=11${mode_band}
 			${dev_id}
 			${ht_capab}
-			set wireless.radio${devidx}.disabled=1
 
 			set wireless.default_radio${devidx}=wifi-iface
 			set wireless.default_radio${devidx}.device=radio${devidx}