nitrogen6x: Move setup_sata to common part

Move setup_sata function definition from platform file nitrogen6x.c
to arch/arm/imx-common/sata.c to avoid code duplication.

Signed-off-by: Giuseppe Pagano <giuseppe.pagano@seco.com>
CC: Stefano Babic <sbabic@denx.de>
CC: Fabio Estevam <fabio.estevam@freescale.com>
CC: Eric Nelson <eric.nelson@boundarydevices.com>
diff --git a/arch/arm/imx-common/Makefile b/arch/arm/imx-common/Makefile
index 2c80441..68f0f52 100644
--- a/arch/arm/imx-common/Makefile
+++ b/arch/arm/imx-common/Makefile
@@ -17,6 +17,9 @@
 ifeq ($(SOC),$(filter $(SOC),mx6 mxs))
 obj-y	+= misc.o
 endif
+ifeq ($(SOC),$(filter $(SOC),mx6))
+objs-$(CONFIG_CMD_SATA) += sata.o
+endif
 obj-$(CONFIG_CMD_BMODE) += cmd_bmode.o
 obj-$(CONFIG_CMD_HDMIDETECT) += cmd_hdmidet.o