ARM: cns3xxx: Add support for AHCI controllers

CNS3xxx chips have AHCI-compatible SATA controller. This patch adds
the support using generic ahci_platform driver.

Signed-off-by: Anton Vorontsov <avorontsov@mvista.com>
diff --git a/arch/arm/mach-cns3xxx/cns3420vb.c b/arch/arm/mach-cns3xxx/cns3420vb.c
index 04ae1ce..9df8391 100644
--- a/arch/arm/mach-cns3xxx/cns3420vb.c
+++ b/arch/arm/mach-cns3xxx/cns3420vb.c
@@ -118,6 +118,7 @@
 {
 	platform_add_devices(cns3420_pdevs, ARRAY_SIZE(cns3420_pdevs));
 
+	cns3xxx_ahci_init();
 	cns3xxx_sdhci_init();
 
 	pm_power_off = cns3xxx_power_off;