conf/machine: fix QEMU x86 sound options

conf/machine: fix QEMU x86 sound options

This updates the QEMU sounds options for x86 emulation,
when "runqemu" is called with the "audio" argument,
to fix the below error:

runqemu - ERROR - Failed to run qemu: qemu-system-x86_64: warning: '-soundhw ac97' is deprecated, please use '-device AC97' instead

Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit b802a5dd1a79c7be3bc790223a733ebc9be4f117)
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>