ASoC: generic: Standardize ASoC menu

Current Kconfig menu at [ALSA for SoC audio support] has no rules.
So, some venders are using menu style, some venders are listed each drivers
on top page, etc. It is difficult to find target vender and/or drivers
because it is very random.

Let's standardize ASoC menu

Signed-off-by: Kuninori Morimoto <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

sound/soc/Kconfig

···
 source "sound/soc/cirrus/Kconfig"
 source "sound/soc/dwc/Kconfig"
 source "sound/soc/fsl/Kconfig"
+source "sound/soc/generic/Kconfig"
 source "sound/soc/google/Kconfig"
 source "sound/soc/hisilicon/Kconfig"
 source "sound/soc/jz4740/Kconfig"
···
 source "sound/soc/codecs/Kconfig"
 
 source "sound/soc/sdw_utils/Kconfig"
-
-# generic frame-work
-source "sound/soc/generic/Kconfig"
 
 endif	# SND_SOC
 

sound/soc/generic/Kconfig

···
 # SPDX-License-Identifier: GPL-2.0-only
+menu "Generic drivers"
+
 config SND_SIMPLE_CARD_UTILS
 	tristate
 
···
 	depends on OF
 	help
 	  This option enables test component sound driver support.
+
+endmenu