bd82x6x: Move to common FADT.

Change-Id: I04ed600796c55f5af4f0a07687f676e6484a9830
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/7200
Reviewed-by: Nicolas Reinecke <nr@das-labor.org>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Tested-by: build bot (Jenkins)
diff --git a/src/mainboard/lenovo/t520/devicetree.cb b/src/mainboard/lenovo/t520/devicetree.cb
index c32e237..d347e82 100644
--- a/src/mainboard/lenovo/t520/devicetree.cb
+++ b/src/mainboard/lenovo/t520/devicetree.cb
@@ -73,6 +73,9 @@
 			# Enable zero-based linear PCIe root port functions
 			register "pcie_port_coalesce" = "1"
 
+			register "c2_latency" = "101"  # c2 not supported
+			register "p_cnt_throttling_supported" = "1"
+
 			device pci 16.0 on end # Management Engine Interface 1
 			device pci 16.1 off end
 			device pci 16.2 off end