bmips: dsl-2750b-b1: fix calibration size

AR9287 uses 3d8, not 440 like newer chips.

Signed-off-by: Rosen Penev <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/17278
Signed-off-by: Hauke Mehrtens <[email protected]>

target/linux/bmips/dts/bcm6328-dlink-dsl-2750b-b1.dts

@@ -180,7 +180,7 @@
 					#size-cells = <1>;
 
 					cal_data_1000: calibration@1000 {
-						reg = <0x1000 0x440>;
+						reg = <0x1000 0x3d8>;
 					};
 				};
 			};