sunxi: don't enable ARMTHUMB XZ BCJ filter in kernel

Having CONFIG_XZ_DEC_ARMTHUMB enabled breaks squashfs when ARM BCJ
filter was used to create the filesystem (and that's what we do on
all ARM targets). Thus unset CONFIG_XZ_DEC_ARMTHUMB to fix
squashfs on sunxi.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

SVN-Revision: 45347

target/linux/sunxi/config-3.18

@@ -473,7 +473,7 @@ CONFIG_XFRM_ALGO=y
 CONFIG_XFRM_USER=y
 CONFIG_XPS=y
 CONFIG_XZ_DEC_ARM=y
-CONFIG_XZ_DEC_ARMTHUMB=y
+# CONFIG_XZ_DEC_ARMTHUMB is not set
 CONFIG_XZ_DEC_BCJ=y
 CONFIG_ZBOOT_ROM_BSS=0
 CONFIG_ZBOOT_ROM_TEXT=0