ARM: imx6ul: Move liteSOM source to SoC directory

Moving arch/arm/mach-litesom/ to arch/arm/cpu/armv7/mx6/ was requested
in [1] during discussion of chiliSOM support patches.

[1] http://lists.denx.de/pipermail/u-boot/2017-January/279137.html

Suggested-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/cpu/armv7/mx6/Kconfig b/arch/arm/cpu/armv7/mx6/Kconfig
index 3b04091..995a910 100644
--- a/arch/arm/cpu/armv7/mx6/Kconfig
+++ b/arch/arm/cpu/armv7/mx6/Kconfig
@@ -35,6 +35,13 @@
 	select ROM_UNIFIED_SECTIONS
 	bool
 
+config MX6UL_LITESOM
+	bool
+	select MX6UL
+	select DM
+	select DM_THERMAL
+	select SUPPORT_SPL
+
 config MX6ULL
 	bool
 	select MX6UL
@@ -248,7 +255,7 @@
 config TARGET_LITEBOARD
 	bool "Grinn liteBoard (i.MX6UL)"
 	select BOARD_LATE_INIT
-	select LITESOM
+	select MX6UL_LITESOM
 
 config TARGET_PLATINUM_PICON
 	bool "platinum-picon"