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/mainboard/intel/baskingridge/romstage.c

@@ -43,9 +43,6 @@ const struct rcba_config_instruction rcba_config[] = {
 	RCBA_SET_REG_32(D25IR, DIR_ROUTE(PIRQA, PIRQB, PIRQC, PIRQD)),
 	RCBA_SET_REG_32(D22IR, DIR_ROUTE(PIRQA, PIRQB, PIRQC, PIRQD)),
 
-	/* Disable unused devices (board specific) */
-	RCBA_RMW_REG_32(FD, ~0, PCH_DISABLE_ALWAYS),
-
 	RCBA_END_CONFIG,
 };