[AVR32] Add missing #include <linux/param.h> to delay.c

__const_udelay() needs HZ, which is defined in <asm/param.h>.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

arch/avr32/lib/delay.c

@@ -12,6 +12,7 @@
 
 #include <linux/delay.h>
 #include <linux/module.h>
+#include <linux/param.h>
 #include <linux/types.h>
 
 #include <asm/processor.h>