soc/amd/picasso/uart: add missing types.h include

BRANCH=zork

Change-Id: I51923d72a2ad8dceeef11e15fb6765262dd514d9
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45309
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/soc/amd/picasso/uart.c

@@ -9,6 +9,7 @@
 #include <soc/southbridge.h>
 #include <soc/gpio.h>
 #include <soc/uart.h>
+#include <types.h>
 
 static const struct _uart_info {
 	uintptr_t base;