dsp: q6asm increase the locking range

Increase the locking range to prevent shared resources from
being abnormal modified.

Change-Id: Icb7ecfd6110874e6ecfa5bea5c1bd2625127e08d
Signed-off-by: Jing Wang <quic_jingwa@quicinc.com>
(cherry picked from commit ebd90817721f88c9215b6e0511fcaff3125f8138)