luci-base: fix luci.sys.wifi.getiwinfo() on radio names
luci-base: fix luci.sys.wifi.getiwinfo() on radio names

Fall back to using a phy-wide iwinfo handle if the vif query yields no result.

Signed-off-by: Jo-Philipp Wich <bd73d35759d75cc215150d1bbc94f1b1078bee01@mein.io>

lbthomsen/openwrt-luci,remakeelectric/luci,lbthomsen/openwrt-luci,artynet/luci,hnyman/luci,Wedmer/luci,openwrt-es/openwrt-luci,nmav/luci,openwrt-es/openwrt-luci,wongsyrone/luci-1,chris5560/openwrt-luci,Wedmer/luci,Noltari/luci,kuoruan/luci,artynet/luci,chris5560/openwrt-luci,kuoruan/lede-luci,hnyman/luci,openwrt-es/openwrt-luci,artynet/luci,nmav/luci,rogerpueyo/luci,openwrt-es/openwrt-luci,chris5560/openwrt-luci,nmav/luci,981213/luci-1,981213/luci-1,lbthomsen/openwrt-luci,nmav/luci,artynet/luci,lbthomsen/openwrt-luci,981213/luci-1,rogerpueyo/luci,Wedmer/luci,remakeelectric/luci,openwrt/luci,chris5560/openwrt-luci,Noltari/luci,rogerpueyo/luci,tobiaswaldvogel/luci,Wedmer/luci,remakeelectric/luci,kuoruan/lede-luci,lbthomsen/openwrt-luci,kuoruan/luci,nmav/luci,Noltari/luci,kuoruan/luci,openwrt/luci,kuoruan/lede-luci,wongsyrone/luci-1,kuoruan/luci,Noltari/luci,remakeelectric/luci,kuoruan/luci,artynet/luci,kuoruan/lede-luci,kuoruan/lede-luci,chris5560/openwrt-luci,Noltari/luci,remakeelectric/luci,tobiaswaldvogel/luci,chris5560/openwrt-luci,tobiaswaldvogel/luci,hnyman/luci,wongsyrone/luci-1,wongsyrone/luci-1,rogerpueyo/luci,openwrt/luci,tobiaswaldvogel/luci,rogerpueyo/luci,remakeelectric/luci,artynet/luci,kuoruan/luci,981213/luci-1,rogerpueyo/luci,hnyman/luci,openwrt-es/openwrt-luci,artynet/luci,hnyman/luci,kuoruan/luci,tobiaswaldvogel/luci,Wedmer/luci,kuoruan/lede-luci,kuoruan/lede-luci,remakeelectric/luci,Noltari/luci,wongsyrone/luci-1,Noltari/luci,openwrt/luci,openwrt-es/openwrt-luci,nmav/luci,openwrt/luci,rogerpueyo/luci,981213/luci-1,lbthomsen/openwrt-luci,chris5560/openwrt-luci,kuoruan/luci,Wedmer/luci,hnyman/luci,tobiaswaldvogel/luci,nmav/luci,openwrt-es/openwrt-luci,Noltari/luci,remakeelectric/luci,hnyman/luci,Noltari/luci,artynet/luci,wongsyrone/luci-1,Wedmer/luci,Wedmer/luci,lbthomsen/openwrt-luci,openwrt-es/openwrt-luci,nmav/luci,nmav/luci,rogerpueyo/luci,kuoruan/lede-luci,artynet/luci,981213/luci-1,tobiaswaldvogel/luci,wongsyrone/luci-1,openwrt/luci,lbthomsen/openwrt-luci,openwrt/luci,wongsyrone/luci-1,chris5560/openwrt-luci,tobiaswaldvogel/luci,981213/luci-1,hnyman/luci,openwrt/luci