intel/sandybridge,bd82x6x: Move enable_smbus() call

Change-Id: Icc6b572fea0c2097a7ed19b3f76c1e658cf32a9a
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38298
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/northbridge/intel/sandybridge/romstage.c

@@ -82,9 +82,6 @@ void mainboard_romstage_entry(void)
 
 	mainboard_early_init(s3resume);
 
-	/* Enable SPD ROMs and DDR-III DRAM */
-	enable_smbus();
-
 	post_code(0x39);
 
 	perform_raminit(s3resume);

src/southbridge/intel/bd82x6x/early_pch.c

@@ -327,4 +327,7 @@ void early_pch_init(void)
 	pch_enable_gbe();
 
 	setup_pch_gpios(&mainboard_gpio_map);
+
+	if (ENV_ROMSTAGE)
+		enable_smbus();
 }