soc/amd/common: Fix missing gpio_banks.h include

Change-Id: I2c92280f3bbd80bd7a0d3abfb2fddcef997e144e
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42943
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

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

@@ -5,6 +5,7 @@
 #include <console/console.h>
 #include <gpio.h>
 #include <amdblocks/acpimmio.h>
+#include <amdblocks/gpio_banks.h>
 #include <soc/gpio.h>
 #include <soc/smi.h>
 #include <assert.h>