ec/acpi/ec.c Link EC code in bootblock & verstage

This allows to read and set bits in the EC ram in the bootblock or
verstage. This can be useful if one needs to read a keyboard key as an
input for get_recovery_mode_switch in vboot.

Change-Id: I20b2264012b2a364a4157d85bfe5a2303cc5e677
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35950
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>

src/ec/acpi/Makefile.inc

@@ -1,7 +1,9 @@
 ifeq ($(CONFIG_EC_ACPI),y)
 
-ramstage-y += ec.c
+bootblock-y += ec.c
+verstage-y += ec.c
 romstage-y += ec.c
+ramstage-y += ec.c
 smm-y += ec.c
 
 endif