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/configs/vexpress_aemv8a_dram_defconfig b/configs/vexpress_aemv8a_dram_defconfig
index c899be0..db492af 100644
--- a/configs/vexpress_aemv8a_dram_defconfig
+++ b/configs/vexpress_aemv8a_dram_defconfig
@@ -14,6 +14,7 @@
 # CONFIG_CMD_EDITENV is not set
 # CONFIG_CMD_ENV_EXISTS is not set
 CONFIG_CMD_MEMTEST=y
+CONFIG_CMD_UNZIP=y
 # CONFIG_CMD_LOADS is not set
 CONFIG_CMD_ARMFLASH=y
 # CONFIG_CMD_FPGA is not set