soc/amd: Move global_smi_enable to common/blocks/smi/smi_util

Change-Id: I4410772a8d3f2dedbb96601d87efb23b14e5f438
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42989
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/picasso/Makefile.inc

@@ -48,7 +48,6 @@ ramstage-y += reset.c
 ramstage-y += acp.c
 ramstage-y += sata.c
 ramstage-y += memmap.c
-ramstage-$(CONFIG_HAVE_SMI_HANDLER) += smi.c
 ramstage-y += uart.c
 ramstage-y += finalize.c
 ramstage-y += soc_util.c