ASoC: amd: acp: Set gpio_spkr_en to None for max speaker amplifer in machine driver

Maxim codec driver already enabling/disabling spk_en_gpio in form of sd_mode gpio
hence remove such gpio access control from machine driver to avoid conflict

Signed-off-by: V sujith kumar Reddy <vsujithkumar.reddy@amd.com>
Link: https://lore.kernel.org/r/20220131203225.1418648-1-vsujithkumar.reddy@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>