sound: adding support to Boeffla sound

[sunilpaulmathew]

Dear @Grarak

This commit will add access to very basic functionalities of Boeffla sound engine, which is currently available for a number of devices. Please note: in order get it worked, I'm forced to make some simple modifications in "boeffla_sound.c". For more information, please visit here. Looking forward to see this feature in KA.

Regards Sunil