ASoC: tegra: Revert fix for uninitialized flat cache warning in tegra210_ahub

Commit 4d4021b0bbd1 ("ASoC: tegra: Fix uninitialized flat cache warning
in tegra210_ahub") attempted to fix the uninitialized flat cache warning
that is observed for the Tegra210 AHUB driver. However, the change broke
various audio tests because an -EBUSY error is returned when accessing
registers from cache before they are read from hardware. Revert this
change for now, until a proper fix is available.

Fixes: 4d4021b0bbd1 ("ASoC: tegra: Fix uninitialized flat cache warning in tegra210_ahub")
Signed-off-by: sheetal <[e-mail]>
Acked-by: Jon Hunter <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

sound/soc/tegra/tegra210_ahub.c

···
 	.val_bits		= 32,
 	.reg_stride		= 4,
 	.max_register		= TEGRA210_MAX_REGISTER_ADDR,
-	.cache_type		= REGCACHE_FLAT_S,
+	.cache_type		= REGCACHE_FLAT,
 };
 
 static const struct regmap_config tegra186_ahub_regmap_config = {
···
 	.val_bits		= 32,
 	.reg_stride		= 4,
 	.max_register		= TEGRA186_MAX_REGISTER_ADDR,
-	.cache_type		= REGCACHE_FLAT_S,
+	.cache_type		= REGCACHE_FLAT,
 };
 
 static const struct regmap_config tegra264_ahub_regmap_config = {
···
 	.reg_stride		= 4,
 	.writeable_reg		= tegra264_ahub_wr_reg,
 	.max_register		= TEGRA264_MAX_REGISTER_ADDR,
-	.cache_type		= REGCACHE_FLAT_S,
+	.cache_type		= REGCACHE_FLAT,
 };
 
 static const struct tegra_ahub_soc_data soc_data_tegra210 = {