ASoC: rsnd: setup BRGCKR/BRRA/BRRB on rsnd_adg_clk_control()

Current adg.c will configure BRGCKR/BRRA/BRRB to output clock
when it start sound. OTAH, rsnd_adg_clk_enable() will enables
clk_a/b/c when driver was probed.
But it is strange, these should be set in the same time.
This patch fixup it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87h6oqzlei.wl-kuninori.morimoto.gx@renesas.com


Signed-off-by: Mark Brown <broonie@kernel.org>