soc/amd/common: Add missing stdint.h to lpc.h

Include the file containing the typedefs for uint_*.

Change-Id: If33765b6dc4236c4b38860bfc4f2cef9b226b81d
Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35269
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Richard Spiegel <richard.spiegel@silverbackltd.com>

src/soc/amd/common/block/include/amdblocks/lpc.h

@@ -17,6 +17,7 @@
 #define __AMDBLOCKS_LPC_H__
 
 #include <types.h>
+#include <stdint.h>
 
 /* PCI registers for D14F3 */
 #define LPC_PCI_CONTROL			0x40