Convert CONFIG_BZIP2 et al to Kconfig

This converts the following to Kconfig:
   CONFIG_BZIP2
   CONFIG_GZIP
   CONFIG_LZO
   CONFIG_ZLIB
   CONFIG_LZMA
   CONFIG_LZO

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/dh_imx6_defconfig b/configs/dh_imx6_defconfig
index e0dfffa..d20405e 100644
--- a/configs/dh_imx6_defconfig
+++ b/configs/dh_imx6_defconfig
@@ -100,3 +100,4 @@
 CONFIG_USB_GADGET_DOWNLOAD=y
 CONFIG_WATCHDOG_TIMEOUT_MSECS=60000
 CONFIG_IMX_WATCHDOG=y
+CONFIG_BZIP2=y