sb/amd/cimx/sb800: Postpone Sb_Poweron_Init() call

With LPC decode enables explicitly set in C env bootblock,
this call can be delayed to happen before AMD_INIT_RESET.

Change-Id: I3a28eaa2cf70b770b022760a2380ded0f43e9a6f
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37449
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Michał Żygowski <michal.zygowski@3mdeb.com>
diff --git a/src/drivers/amd/agesa/romstage.c b/src/drivers/amd/agesa/romstage.c
index dbf8bd6..ee4d45e 100644
--- a/src/drivers/amd/agesa/romstage.c
+++ b/src/drivers/amd/agesa/romstage.c
@@ -29,11 +29,6 @@
 
 void __weak board_BeforeAgesa(struct sysinfo *cb) { }
 
-void __weak platform_once(struct sysinfo *cb)
-{
-	board_BeforeAgesa(cb);
-}
-
 static void fill_sysinfo(struct sysinfo *cb)
 {
 	memset(cb, 0, sizeof(*cb));
@@ -67,7 +62,7 @@
 			timestamp_init(timestamp_get());
 		timestamp_add_now(TS_START_ROMSTAGE);
 
-		platform_once(cb);
+		board_BeforeAgesa(cb);
 
 		console_init();
 	}