arm: fix implicit use of moduleparam in mach-mx31*.c

To get the definition of core_param() they need this header.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

arch/arm/mach-imx/mach-mx31moboard.c

@@ -18,6 +18,7 @@
 #include <linux/gpio.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
+#include <linux/moduleparam.h>
 #include <linux/leds.h>
 #include <linux/memory.h>
 #include <linux/mtd/physmap.h>