mb/system76/addw1: Disable SaOcSupport

Typically we set SaOcSupport to allow overclocking RAM, but addw2 saw a
high rate of errors when using the provided 3200 MHz DIMMs. Disable OC
so modules run at the standard 2933 MHz.

Change-Id: I469b9c73d2e6bfa0b3c9175bcc87584aeaa95f75
Signed-off-by: Jeremy Soller <jeremy@system76.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67837
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/system76/addw1/romstage.c

@@ -20,8 +20,5 @@ static const struct cnl_mb_cfg memcfg = {
 
 void mainboard_memory_init_params(FSPM_UPD *memupd)
 {
-	// Allow higher memory speeds
-	memupd->FspmConfig.SaOcSupport = 1;
-
 	cannonlake_memcfg_init(&memupd->FspmConfig, &memcfg);
 }