dts: stm32f411e_disco@B: fix wrong device label lsm303agr-magn@1e.

the device label lsm303agr-magn@1e doesn't exist in the base dts
file stm32f411e_disco.dts, it is lsm303agr-magn, so correct it.

Signed-off-by: Chen Peng1 <[email protected]>

Author: Chen Peng1

boards/arm/stm32f411e_disco/stm32f411e_disco_B.overlay

@@ -11,7 +11,7 @@
 };
 
 &i2c1 {
-    /delete-node/ lsm303agr-magn@1e;
+    /delete-node/ lsm303agr-magn;
     /delete-node/ lsm303agr-accel@19;
 
 	lsm303dlhc_magn: lsm303dlhc-magn@1e {