vc/amd/opensil/genoa_poc: Explicitly include static.h for config_of_soc

As per commit 8651731537 ("sconfig: Move config_of_soc from device.h
to static.h"), sources that require access to the devicetree should
directly include static.h so that it can be removed from device.h,
eliminating unnecessary dependencies on static.h for files that only
need the types and function declarations in device.h.

Change-Id: I83c3e5db85b98196c465146ba8e3481041d2f7eb
Signed-off-by: Nicholas Chin <nic.c3.14@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84589
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

src/vendorcode/amd/opensil/genoa_poc/ramstage.c

@@ -9,6 +9,7 @@
 #include <cpu/cpu.h>
 #include <device/device.h>
 #include <soc/soc_chip.h>
+#include <static.h>
 #include <stdio.h>
 #include <xSIM-api.h>
 #include "opensil_console.h"