cpu/intel/slot_1: Move to C_ENVIRONMENT_BOOTBLOCK

Console is not yet enabled in bootblock. This will be done in
a different CL.

Change-Id: Ic751d42a1969fb79fb50366f766d8796846a0bc4
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36774
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
diff --git a/src/southbridge/intel/i82371eb/Makefile.inc b/src/southbridge/intel/i82371eb/Makefile.inc
index 131010f..390fd97 100644
--- a/src/southbridge/intel/i82371eb/Makefile.inc
+++ b/src/southbridge/intel/i82371eb/Makefile.inc
@@ -16,6 +16,8 @@
 
 ifeq ($(CONFIG_SOUTHBRIDGE_INTEL_I82371EB),y)
 
+bootblock-y += bootblock.c
+
 ramstage-y +=  i82371eb.c
 ramstage-y +=  isa.c
 ramstage-y +=  ide.c