src: Add missing include <stdint.h>

Change-Id: Idf10a09745756887a517da4c26db7a90a1bf9543
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/29403
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/drivers/siemens/nc_fpga/nc_fpga.h

@@ -16,6 +16,8 @@
 #ifndef _SIEMENS_NC_FPGA_H_
 #define _SIEMENS_NC_FPGA_H_
 
+#include <stdint.h>
+
 #define NC_MAGIC_OFFSET			0x020
 #define  NC_FPGA_MAGIC			0x4E433746
 #define NC_CAP1_OFFSET			0x080