lantiq: fixed wifi support for AVM FRITZ!Box 7430

adds the correct offset for the calibration data.
The values are according to the OpenWrt Forum Thread:
"Fritzbox 7430 and wifi".

Link: <https://forum.openwrt.org/t/fritzbox-7430-and-wifi/86944>
Reported-by: RENErica
Signed-off-by: Joel Linn <jl@conductive.de>
[changed commit message]
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

target/linux/lantiq/xrx200/base-files/etc/hotplug.d/firmware/12-ath9k-eeprom

@@ -23,10 +23,12 @@ case "$FIRMWARE" in
 			avm,fritz7360-v2)
 				caldata_extract "urlader" 0x985 0x1000
 				;;
-			avm,fritz7412|\
-			avm,fritz7430)
+			avm,fritz7412)
 				/usr/bin/fritz_cal_extract -i 1 -s 0x1e000 -e 0x207 -l 4096 -o /lib/firmware/$FIRMWARE $(find_mtd_chardev "urlader")
 				;;
+			avm,fritz7430)
+				/usr/bin/fritz_cal_extract -i 1 -s 0x1e800 -e 0x207 -l 4096 -o /lib/firmware/$FIRMWARE $(find_mtd_chardev "urlader")
+				;;
 			bt,homehub-v5a)
 				caldata_extract_ubi "caldata" 0x1000 0x1000
 				ath9k_patch_mac_crc $(macaddr_add $(mtd_get_mac_binary_ubi caldata 0x110c) 2) 0x10c