ARM: 6003/1: removing compilation warning from pl061.h

pl061.h is using u8 type. including <linux/types.h> in pl061.h to avoid
warning.
Signed-off-by: NViresh Kumar <viresh.kumar@st.com>
Acked-by: NBaruch Siach <baruch@tkos.co.il>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

include/linux/amba/pl061.h

+#include <linux/types.h>
+
 /* platform data for the PL061 GPIO driver */
 
 struct pl061_platform_data {