soc/amd/common/block/gpio_banks: add missing types.h include

In this file bool, uint8_t and uint32_t are used, so include types.h
directly to have those types defined instead of relying to have those
included indirectly via amdblocks/gpio_banks.h.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I6f4626a50219fab818e8bc5087961a731b44e71b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57788
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>

src/soc/amd/common/block/gpio_banks/gpio.c

@@ -14,6 +14,7 @@
 #include <soc/smi.h>
 #include <assert.h>
 #include <string.h>
+#include <types.h>
 
 /*
  * acpimmio_gpio0, acpimmio_remote_gpio and acpimmio_iomux are defined in