soc/amd/phoenix/devicetree: drop i2s_ac97 device
In both PPR #57019 Rev 3.03 and PPR #57396 Rev 3.04, the i2s_ac97
function on bus C isn't mentioned any more and the microarchitecture
specification document for this SoC also doesn't mention it, so remove
it from the devicetree.
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Ibd115953bdd60e1dfcc79797b0c2158e5d861636
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74564
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Reviewed-by: Fred Reitberger <reitbergerfred@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>