4a: Update 4a-hal-generic for UpSquared board

4a: Update 4a-hal-generic for UpSquared board

This commit bump '4a-hal-generic' to have Intel UpSquared hal
available in ./4a-hal-generic/etc.available/.
An update of the recipe is also made to automatically deploy
Intel UpSquared hal in ./4a-hal-generic/etc/. when compiling AGL for
'intel-corei7-64' platform.

* a94119d Correct typo in Intel UpSquared hal
* 2b64aed Update clone commands in README.md
* 4a2672a Update 'halmap' section of Intel UpSquare hal
*   424263f Merge pull request #2 from dominig/master
|\
| * a35e146 4a hal for Intel UpSquare via HDMI socket
|/
* 226f16b bluetooth: set audio rate to 44100

Bug-AGL: SPEC-1751

Change-Id: I31d8e9845b50bf59f514eb10f54ee950a0d42e9a
Signed-off-by: Jonathan Aillet <jonathan.aillet@iot.bzh>