ipq40xx: Limit usable channels for OpenMesh A62 PHYs

The OpenMesh A62 is a tri-band device (1x 2.4GHz, 2x 5GHz) with special
filters in front of the RX+TX paths to the 5GHz PHYs. These filtered
channel can in theory still be used by the hardware but the signal strength
is reduced so much that it makes no sense.

Signed-off-by: Sven Eckelmann <sven.eckelmann@openmesh.com>

target/linux/ipq40xx/files-4.14/arch/arm/boot/dts/qcom-ipq4019-a62.dts

@@ -222,6 +222,7 @@
 			status = "okay";
 			reg = <0x00010000 0 0 0 0>;
 			qcom,ath10k-calibration-variant = "OM-A62";
+			ieee80211-freq-limit = <5170000 5350000>;
 		};
 	};
 };
@@ -234,4 +235,5 @@
 &wifi1 {
 	status = "okay";
 	qcom,ath10k-calibration-variant = "OM-A62";
+	ieee80211-freq-limit = <5470000 5875000>;
 };