cmd: move CONFIG_CMD_UNZIP and CONFIG_CMD_ZIP to Kconfig

CONFIG_CMD_ZIP is not defined by any board.  I am moving
CONFIG_CMD_UNZIP to defconfig files except UniPhier SoC family.

I am the maintainer of UniPhier platform, so I know "select CMD_UNZIP"
is better for this platform.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Stefan Roese <sr@denx.de>
Acked-by: Ryan Harkin <ryan.harkin@linaro.org>
Tested-by: Ryan Harkin <ryan.harkin@linaro.org>
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 25ac895..ef53156 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -359,6 +359,16 @@
 	help
 	  Display memory information.
 
+config CMD_UNZIP
+	bool "unzip"
+	help
+	  Uncompress a zip-compressed memory region.
+
+config CMD_ZIP
+	bool "zip"
+	help
+	  Compress a memory region with zlib deflate method.
+
 endmenu
 
 menu "Device access commands"