soc: arm64: nxp: mimx9: Modify linker script to include SOF sections

Since SOF uses some extra sections we need to add them to the linker
script. The used linker script is simply a copy of arm64 linker script
with SOF regions included. This is because conditionally adding sections
to the main arm64 linker script is not really desirable.

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