ath79: fix calibration size for AR9285

These devices use AR9285, which uses 1f8 as the calibration size, not
440 like newer chips do. Actually the driver mandates a minimum of 200.

Signed-off-by: Rosen Penev <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/19863
Signed-off-by: Hauke Mehrtens <[email protected]>

target/linux/ath79/dts/ar7240_openmesh_om2p-v1.dts

@@ -145,7 +145,7 @@
 					};
 
 					calibration_art_1000: calibration@1000 {
-						reg = <0x1000 0x440>;
+						reg = <0x1000 0x200>;
 					};
 				};
 			};