boards: arm64: mimx93_evk: Introduce new board for SOF usage

This commit introduces a new variant of the mimx93_evk_a55 board
used to run the SOF module.

This is required because we don't want to pollute the imx93_a55
generic board with SOF-specific nodes such as the memory nodes.
Also, the SOF-specific drivers should not be activated in the
generic board.

SOF with Jailhouse also requires some specific configurations
such as the 40-bit PAs and VAs and the static data cache line
size so this is another reason for which this new
board had to be created.

Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>