tools/libxl: Replace deprecated -soundhw on QEMU command line

tools/libxl: Replace deprecated -soundhw on QEMU command line

-soundhw is deprecated since 825ff02911c9 ("audio: add soundhw
deprecation notice"), QEMU v5.1, and is been remove for upcoming v7.1
by 039a68373c45 ("introduce -audio as a replacement for -soundhw").

Instead we can just add the sound card with "-device", for most option
that "-soundhw" could handle. "-device" is an option that existed
before QEMU 1.0, and could already be used to add audio hardware.

The list of possible option for libxl's "soundhw" is taken the list
from QEMU 7.0.

The list of options for "soundhw" are listed in order of preference in
the manual. The first three (hda, ac97, es1370) are PCI devices and
easy to test on Linux, and the last four are ISA devices which doesn't
seems to work out of the box on linux.

The sound card 'pcspk' isn't listed even if it used to be accepted by
'-soundhw' because QEMU crash when trying to add it to a Xen domain.
Also, it wouldn't work with "-device" might need to be "-machine
pcspk-audiodev=default" instead.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Jason Andryuk <jandryuk@gmail.com>