ARM: sunxi: move board/sunxi/Kconfig to arch/arm/mach-sunxi/Kconfig

For the consistent location of SoC-level Kconfig.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/Kconfig

@@ -1226,6 +1226,8 @@ source "arch/arm/mach-sti/Kconfig"
 
 source "arch/arm/mach-stm32/Kconfig"
 
+source "arch/arm/mach-sunxi/Kconfig"
+
 source "arch/arm/mach-tegra/Kconfig"
 
 source "arch/arm/mach-uniphier/Kconfig"
@@ -1311,7 +1313,6 @@ source "board/spear/spear320/Kconfig"
 source "board/spear/spear600/Kconfig"
 source "board/spear/x600/Kconfig"
 source "board/st/stv0991/Kconfig"
-source "board/sunxi/Kconfig"
 source "board/syteco/zmx25/Kconfig"
 source "board/tcl/sl50/Kconfig"
 source "board/ti/am335x/Kconfig"