ipq40xx: add missing backslash in 11-ath10k-caldata

This adds a missing backslash in the caldata-extraction script. Without
this fix, caldata extraction fails for every device.

Signed-off-by: David Bauer <mail@david-bauer.net>

target/linux/ipq40xx/base-files/etc/hotplug.d/firmware/11-ath10k-caldata

@@ -136,7 +136,7 @@ case "$FIRMWARE" in
 	openmesh,a42 |\
 	openmesh,a62 |\
 	qxwlan,e2600ac-c1 |\
-	qxwlan,e2600ac-c2 |
+	qxwlan,e2600ac-c2 |\
 	unielec,u4019-32m)
 		caldata_extract "0:ART" 0x5000 0x2f20
 		;;