sb/intel/lynxpoint: Factor out RCBA Function Disable

Comments stating that this was mainboard-specific were very wrong.

Change-Id: I7026ca9c7dabd01b4a0c0549b697e006d5f75eb8
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43096
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tristan Corrick <tristan@corrick.kiwi>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/southbridge/intel/lynxpoint/early_pch.c

@@ -103,6 +103,8 @@ int early_pch_init(const void *gpio_map,
 	/* Mainboard RCBA settings */
 	pch_config_rcba(rcba_config);
 
+	RCBA32_OR(FD, PCH_DISABLE_ALWAYS);
+
 	wake_from_s3 = southbridge_detect_s3_resume();
 
 	elog_boot_notify(wake_from_s3);