ACPI: Remove CONFIG_GENERATE_ACPI_TABLES

As currently many systems would be barely functional without ACPI,
always generate ACPI tables if supported.

Change-Id: I372dbd03101030c904dab153552a1291f3b63518
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/4609
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>
diff --git a/src/northbridge/intel/sandybridge/Makefile.inc b/src/northbridge/intel/sandybridge/Makefile.inc
index 5dfd877..09d6614 100644
--- a/src/northbridge/intel/sandybridge/Makefile.inc
+++ b/src/northbridge/intel/sandybridge/Makefile.inc
@@ -23,7 +23,7 @@
 ramstage-$(CONFIG_IVYBRIDGE_LVDS) += gma_ivybridge_lvds.c
 ramstage-$(CONFIG_SANDYBRIDGE_LVDS) += gma_sandybridge_lvds.c
 
-ramstage-$(CONFIG_GENERATE_ACPI_TABLES) += acpi.c
+ramstage-y += acpi.c
 ramstage-y += mrccache.c
 
 romstage-y += ram_calc.c