bmips: sercomm-msp430: fix include

Include <linux/of.h> instead of <linux/of_device.h>.
This problem arised when adding support for 6.12, but it can be fixed on
older kernels too.

Signed-off-by: Álvaro Fernández Rojas <[email protected]>

target/linux/bmips/files/drivers/leds/leds-sercomm-msp430.c

@@ -8,7 +8,7 @@
 #include <linux/delay.h>
 #include <linux/leds.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/spi/spi.h>
 #include "leds.h"