X60/T60: enable AHCI mode

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Change-Id: I2166ae9ee9e7e0e431583249f015d130d15fac61
Reviewed-on: http://review.coreboot.org/341
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/src/mainboard/lenovo/x60/devicetree.cb b/src/mainboard/lenovo/x60/devicetree.cb
index 000f9c7..2f0a179 100644
--- a/src/mainboard/lenovo/x60/devicetree.cb
+++ b/src/mainboard/lenovo/x60/devicetree.cb
@@ -56,7 +56,8 @@
 			register "gpi12_routing" = "1"
 			register "gpi8_routing" = "2"
 
-			register "sata_ahci" = "0x0"
+			register "sata_ahci" = "0x1"
+			register "sata_ports_implemented" = "0x01"
 
 			register "gpe0_en" = "0x11000006"
 			register "alt_gp_smi_en" = "0x1000"