ar71xx: fix MAC addresses for Archer C5 v1, C7 v1/v2, WDR4900 v2

As discussed in 1d18a14a90c7 ("ath79: really fix TP-Link Archer C7
v2 MAC address"), stock firmware MAC address assignment is
actually as follows:

wlan0 (5GHz) : -1
wlan1 (2.4GHz) : 0
eth1 (LAN) : 0
eth0 (WAN) : 1

This has never been fixed for ar71xx, so let's do it now.
Note that with WDR4900 v2 even both wlan0 and wlan1 where assigned
to basemac-1 before ...

Fixes: FS#408

Signed-off-by: Adrian Schmutzler <[email protected]>

target/linux/ar71xx/base-files/etc/hotplug.d/firmware/11-ath10k-caldata

@@ -143,7 +143,7 @@ case "$FIRMWARE" in
 	archer-c5|\
 	archer-c7)
 		ath10kcal_extract "art" 0x5000 0x844
-		ath10kcal_patch_mac $(macaddr_add $(cat /sys/class/net/eth1/address) -2)
+		ath10kcal_patch_mac $(macaddr_add $(cat /sys/class/net/eth1/address) -1)
 		;;
 	nbg6616|\
 	nbg6716)

target/linux/ar71xx/files/arch/mips/ath79/mach-archer-c7.c

@@ -212,8 +212,7 @@ static void __init common_setup(bool pcie_slot)
 	ath79_register_leds_gpio(-1, ARRAY_SIZE(archer_c7_leds_gpio),
 				 archer_c7_leds_gpio);
 
-	ath79_init_mac(tmpmac, mac, -1);
-	ath79_register_wmac(art + ARCHER_C7_WMAC_CALDATA_OFFSET, tmpmac);
+	ath79_register_wmac(art + ARCHER_C7_WMAC_CALDATA_OFFSET, mac);
 
 	if (pcie_slot) {
 		ath79_register_pci();