msm: adsprpc: Avoid taking reference for group_info

Currently, the get_current_groups API accesses group info, which
increases the usage refcount. If the IOCTL using the
get_current_groups API is called many times, the usage counter
overflows. To avoid this, access group info without taking a
reference. A reference is not required as group info is not
released during the IOCTL call.

Change-Id: I596fefd315a942864c05ad13778effdbce32acba
Signed-off-by: ANANDU KRISHNAN E <[email protected]>
(cherry picked from commit 28204d12)