msm: sensor: Fix to validate the settings size in flash

The size of the settings, copied from userspace, is directly checked
in msm_cci_data_queue with CCI_I2C_MAX_WRITE. This might cause
out of bound access in function msm_cci_data_queue as the max size is
MAX_I2C_REG_SET. Hence adding check on the size in flash driver itself.

Change-Id: Iaf8b62815282386af58d1b111876cc80411385a0
CR fixed: 2062894
Signed-off-by: Rahul Sharma <sharah@codeaurora.org>
Signed-off-by: Andy Sun <bins@codeaurora.org>