Replicate "aries: use uncompressed ramdisk" on galaxys4gmtd

The kernel already performs LZMA compression on the whole ramdisk,
so compressing it once using gzip increases the size. Using
uncompressed ramdisk reduced the size from 7.4 MB to 5.4 MB.

See: http://review.cyanogenmod.org/63721

Signed-off-by: Fernando Barillas <fbis251@mailbox.org>