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/gm45/Makefile.inc b/src/northbridge/intel/gm45/Makefile.inc
index 5caa8af..1352525 100644
--- a/src/northbridge/intel/gm45/Makefile.inc
+++ b/src/northbridge/intel/gm45/Makefile.inc
@@ -31,7 +31,7 @@
 romstage-y += ram_calc.c
 romstage-$(CONFIG_IOMMU) += iommu.c
 
-ramstage-$(CONFIG_GENERATE_ACPI_TABLES) += acpi.c
+ramstage-y += acpi.c
 
 ramstage-y += ram_calc.c
 ramstage-y += northbridge.c