linux-imx

nds32: Fix the unknown type u8 issue.

It broke the 'allmodconfig' build.
We need to include <linux/types.h> to make sure the type is defined
before using it.

Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>