ARM: exynos: move SoC sources to mach-exynos

Move arch/arm/cpu/armv7/exynos/* to arch/arm/mach-exynos/* to allow
reuse of existing code for ARMv8 based Exynos platforms.

Cc: Minkyu Kang <mk7.kang@samsung.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Masahiro Yamada <yamada.m@jp.panasonic.com>
Signed-off-by: Thomas Abraham <thomas.ab@samsung.com>
Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Tested-by: Przemyslaw Marczak <p.marczak@samsung.com>
Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index ee9a1b3..735d971 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -838,7 +838,7 @@
 
 source "arch/arm/mach-davinci/Kconfig"
 
-source "arch/arm/cpu/armv7/exynos/Kconfig"
+source "arch/arm/mach-exynos/Kconfig"
 
 source "arch/arm/mach-highbank/Kconfig"