sb/intel/lynxpoint: Drop RCBA reg script mechanism

It is no longer used anywhere. Drop it before it rots.

Change-Id: I4bc3d5bd898058e575144a3c6c3fccb78dcff2e2
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43099
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tristan Corrick <tristan@corrick.kiwi>
diff --git a/src/southbridge/intel/lynxpoint/Makefile.inc b/src/southbridge/intel/lynxpoint/Makefile.inc
index fa0ef0b..e3d056d 100644
--- a/src/southbridge/intel/lynxpoint/Makefile.inc
+++ b/src/southbridge/intel/lynxpoint/Makefile.inc
@@ -22,7 +22,6 @@
 ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/hda_verb.c
 endif
 
-ramstage-y += rcba.c
 ramstage-y += me_status.c
 ramstage-y += acpi.c
 
@@ -34,7 +33,7 @@
 
 bootblock-y += early_pch.c
 romstage-y += early_usb.c early_smbus.c early_me.c me_status.c early_pch.c
-romstage-y += rcba.c pmutil.c
+romstage-y += pmutil.c
 
 ifeq ($(CONFIG_INTEL_LYNXPOINT_LP),y)
 romstage-y += lp_gpio.c