arm: build mach-imx for i.MX8

Build mach-imx for i.MX8

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Anatolij Gustschin <agust@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 8f50560..7285913 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -105,7 +105,7 @@
 libs-y += arch/arm/mach-imx/
 endif
 else
-ifneq (,$(filter $(SOC), mx25 mx27 mx5 mx6 mx7 mx7ulp mx31 mx35 mxs mx8m vf610))
+ifneq (,$(filter $(SOC), mx25 mx27 mx5 mx6 mx7 mx7ulp mx31 mx35 mxs mx8m imx8 vf610))
 libs-y += arch/arm/mach-imx/
 endif
 endif