ASoC: rt1318: Add RT1318 SDCA vendor-specific driver

[ Upstream commit 6ad73a2b ]

This is the initial amplifier driver for rt1318 SDCA version.

Signed-off-by: Shuming Fan <shumingf@realtek.com>
Link: https://lore.kernel.org/r/20221108092727.13011-1-shumingf@realtek.com


Signed-off-by: Mark Brown <broonie@kernel.org>
Stable-dep-of: 84822215 ("ASoC: codecs: wcd938x: fix accessing regmap on unattached devices")
Signed-off-by: Sasha Levin <sashal@kernel.org>