ipq806x: fix wireless macs

Commit 71a39b8 ("ipq806x: Fix wireless support for Netgear Nighthawk X4S
D7800") added a trailing TAB char after the backslash which prevents
the assignment of the correct MACs for wifi devices.

Fixes: FS#451

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>
[reworded commit message]
Signed-off-by: Mathias Kresin <dev@kresin.me>

target/linux/ipq806x/base-files/etc/hotplug.d/ieee80211/10_fix_wifi_mac

@@ -16,7 +16,7 @@ case "$board" in
 		echo $(macaddr_add $(mtd_get_mac_binary default-mac 8)  $(($PHYNBR - 1)) ) > /sys${DEVPATH}/macaddress
 		;;
 	d7800 |\
-	r7500v2 |\	
+	r7500v2 |\
 	r7800)
 		echo $(macaddr_add $(mtd_get_mac_binary art 6)  $(($PHYNBR + 1)) ) > /sys${DEVPATH}/macaddress
 		;;