ASoC: rt715: Make read-only arrays capture_reg_H and capture_reg_L static const

Don't populate the read-only arrays capture_reg_H and capture_reg_L
on the stack but instead make them static const. Also makes the
object code a little smaller.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20221202171450.1815346-1-colin.i.king@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>