arm64: dts: freescale: Fix sound card model for MBa8Mx

The audio codec connection on MBa8Mx is identical to MBa7 (imx7) and MBa6
(imx6). Use the same sound card model as well.

Fixes commit dfcd1b6f ("arm64: dts: freescale: add initial device tree
for TQMa8MQML with i.MX8MM")
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>