Audio: modify audio driver satisfy nuttx alsa

[yangyalei]

Summary

Add vela alsa lib interface

Impact

nop

Testing

Use alsa lib interface play music in allwinnertech&BES platform

[yangyalei]

This PR is related to apache/nuttx-apps#2970

[cederom]

Thank you @yangyalei amazing work porting ALSA to NuttX! :-)

[acassis]

ping @yangyalei

[yangyalei]

ping @yangyalei

done

[jerpelea]

please add commit description

[acassis]

@yangyalei very nice! Please rebase to fix the CI issue with xtensa

[acassis]

Also please remove the Draft

[cederom]

There are remarks, lets wait until everything is solved out :-)

• git commit needs an update.
• this looks like small update, what are possible problems @xiaoxiang781216 ?
• my main concern is discussion from Add vela alsa lib interface nuttx-apps#2970 on ALSA inclusion in NuttX that would not violate GPL?

[xiaoxiang781216]

There are remarks, lets wait until everything is solved out :-)

• git commit needs an update.
• this looks like small update, what are possible problems @xiaoxiang781216 ?

it isn't a new driver which implement a well defined interface(ioctl), but add a new interaction model with the userspace application. All this kind of improvement need review carefully to ensure the design and implementation is general enough for all drivers.
I change it to draft state, because I want the patch get the serious review before merging.