arm: Support iotrace feature

Support the iotrace feature for ARM, when enabled.

Signed-off-by: Simon Glass <sjg@chromium.org>

arch/arm/include/asm/io.h

@@ -437,4 +437,7 @@ out:
 
 #endif	/* __mem_isa */
 #endif	/* __KERNEL__ */
+
+#include <iotrace.h>
+
 #endif	/* __ASM_ARM_IO_H */