msm: camera: sensor: Validate sensor related name length

Variable "slave_info->sensor_name", "slave_info->eeprom_name",
"slave_info->actuator_name" and "slave_info->ois_name" are
from user input, which may be not NULL terminated.
OOB will be possible when accessing these variable.

Add a validation for these name length.

Change-Id: I9a570372707b7f8365a625d6b0662e87d1b4926e
Signed-off-by: Depeng Shao <dshao@codeaurora.org>