amd/stoneyridge: Change SMM setup functions

Remove the APMC-specific initialization call.  Make the function
which programs the event type not static and call it from the
southbridge.c file.

Change-Id: I1e3cf898637720fa835de0a6e735c6a65fe2d3a2
Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-on: https://review.coreboot.org/21750
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Marc Jones <marc@marcjonesconsulting.com>
diff --git a/src/soc/amd/stoneyridge/southbridge.c b/src/soc/amd/stoneyridge/southbridge.c
index 3356e97..b947be1 100644
--- a/src/soc/amd/stoneyridge/southbridge.c
+++ b/src/soc/amd/stoneyridge/southbridge.c
@@ -57,8 +57,9 @@
 	pm_write16(PM_CPU_CTRL, ACPI_CPU_CONTROL);
 
 	if (IS_ENABLED(CONFIG_HAVE_SMI_HANDLER)) {
+		/* APMC - SMI Command Port */
 		pm_write16(PM_ACPI_SMI_CMD, APM_CNT);
-		enable_acpi_cmd_smi();
+		configure_smi(SMITYPE_SMI_CMD_PORT, SMI_MODE_SMI);
 	} else {
 		pm_write16(PM_ACPI_SMI_CMD, 0);
 	}