7x30-smd: cb_list_lock is now a spinlock

Most (if not all) files in */mach-msm/7x30-smd rely on this header.
Everything using cb_list_lock has been updated for what should be
a spinlock, yet this remained a mutex.

Signed-off-by: Luis Cruz <ljc2491@gmail.com>
msm_audio: Clean up non-msm7x30 specifics from header

We are using a version of qdsp close enough to the stock one used for
vivo (msm7x30); we don't need this (since this is a 7x30-specific kernel).

Signed-off-by: Luis Cruz <ljc2491@gmail.com>