msm: camera_v2: Fix qos update warning

qos requirement is not inited when update is called.

[...]
[   27.206894] msm_pm_qos_update_request: update request 100
[   27.206900] msm_pm_qos_add_request: add request
[   27.206904] pm_qos_update_request() called for unknown object
[   27.206915] ------------[ cut here ]------------
[   27.206928] WARNING: CPU: 5 PID: 1107 at kernel/power/qos.c:696 pm_qos_update_request+0x4c/0x60
[   27.206935] CPU: 5 PID: 1107 Comm: qvrservice Tainted: G S              4.14.185-Chips #1
[   27.206937] Hardware name: Qualcomm Technologies, Inc. trinket pm6125 + pmi632 IDP (DT)
[   27.206939] task: 00000000ffaf085c task.stack: 000000007a0f23be
[   27.206942] pc : pm_qos_update_request+0x4c/0x60
[   27.206943] lr : pm_qos_update_request+0x4c/0x60
[...]

Signed-off-by: Ahmad Thoriq Najahi <najahi@chips-projects.xyz>
[@Jprimero15: Port to k4.9 camera_v2]
Signed-off-by: Jprimero15 <jprimero155@gmail.com>