freescale-imx: bump to 3.14.28-1.0.0_ga release

Add hash files for the updated packages.

Also update the license of firmware-imx.

This patch is based on the Yocto equivalent:
5521d77c9f191b5808cb3bad4af9484ac

Those packages have been implicitely tested through gstreamer as the
plugins rely on them for vpu decoding for instance:
 # gst-launch-0.10 playbin
 # uri=file:///root/tears_of_steel_1080p.webm
 # gst-launch-1.0 playbin uri=file:///root/tears_of_steel_1080p.webm


 # gst-launch-1.0 filesrc location=/root/tears_of_steel_1080p.webm ! \
   matroskademux ! imxvpudec ! imxipuvideosink

Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>