fix natty firmware

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

mk_mmc.sh

@@ -242,7 +242,7 @@ case "$DIST" in
     natty)
 	rm -f ${TEMPDIR}/dl/index.html || true
 	wget --directory-prefix=${TEMPDIR}/dl/ http://ports.ubuntu.com/pool/main/l/linux-firmware/
-	NATTY_FW=$(cat ${TEMPDIR}/dl/index.html | grep 1.48 | grep linux-firmware | grep _all.deb | head -1 | awk -F"\"" '{print $8}')
+	NATTY_FW=$(cat ${TEMPDIR}/dl/index.html | grep 1.52 | grep linux-firmware | grep _all.deb | head -1 | awk -F"\"" '{print $8}')
 	wget -c --directory-prefix=${DIR}/dl/${DIST} http://ports.ubuntu.com/pool/main/l/linux-firmware/${NATTY_FW}
 	NATTY_FW=${NATTY_FW##*/}
 
@@ -250,7 +250,7 @@ case "$DIST" in
 	wget --directory-prefix=${TEMPDIR}/dl/ http://ports.ubuntu.com/pool/multiverse/l/linux-firmware-nonfree/
 	NATTY_NONF_FW=$(cat ${TEMPDIR}/dl/index.html | grep 1.9 | grep linux-firmware-nonfree | grep _all.deb | head -1 | awk -F"\"" '{print $8}')
 	wget -c --directory-prefix=${DIR}/dl/${DIST} http://ports.ubuntu.com/pool/multiverse/l/linux-firmware-nonfree/${NATTY_NONF_FW}
-	NATTY_NONF_FW=${NATTYs_NONF_FW##*/}
+	NATTY_NONF_FW=${NATTY_NONF_FW##*/}
 
 	#ar9170
 	wget -c --directory-prefix=${DIR}/dl/${DIST} http://www.kernel.org/pub/linux/kernel/people/chr/carl9170/fw/1.9.2/carl9170-1.fw