arm64: dts: renesas: r9a07g044: Fix external clk node names

Add suffix '-clk' for can and extal clk node names and replace the
clk node names audio_clk{1,2} with audio{1,2}-clk as per the device
tree specification.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20220428133156.18080-1-biju.das.jz@bp.renesas.com


Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>