i82801gx: Handle whole FADT in southbridge.

Do all the handling in SB code with few parameters from devicetree.cb
instead of having mobo callbacks.

Change-Id: I8fd02ff05553a3c51ea5f6ae66b8f5502509e2bc
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/7199
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
diff --git a/src/mainboard/roda/rk886ex/devicetree.cb b/src/mainboard/roda/rk886ex/devicetree.cb
index 7b9d7a1..3fe8b2a 100644
--- a/src/mainboard/roda/rk886ex/devicetree.cb
+++ b/src/mainboard/roda/rk886ex/devicetree.cb
@@ -54,6 +54,10 @@
 			register "gpi7_routing"  = "2"
 			register "gpe0_en" = "0x20800007"
 
+			register "c3_latency" = "0x23"
+			register "docking_supported" = "1"
+			register "p_cnt_throttling_supported" = "1"
+
                         register "ide_legacy_combined" = "0x1"
                         register "ide_enable_primary" = "0x1"
                         register "ide_enable_secondary" = "0x0"