ACPICA: use new ACPI headers.

Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/arch/x86_64/kernel/mpparse.c b/arch/x86_64/kernel/mpparse.c
index 0807256..50dd8be 100644
--- a/arch/x86_64/kernel/mpparse.c
+++ b/arch/x86_64/kernel/mpparse.c
@@ -798,7 +798,7 @@
 		return gsi;
 
 	/* Don't set up the ACPI SCI because it's already set up */
-	if (acpi_fadt.sci_int == gsi)
+	if (acpi_gbl_FADT.sci_interrupt == gsi)
 		return gsi;
 
 	ioapic = mp_find_ioapic(gsi);