msm: camera: sensor: Correct the datatype for request id

Request id is having uint64 type from request manager, but sensor
driver is handling it with int64. This may cause the out of bound
access while accessing the data. This change corrects the data
type to handle data correctly.

CRs-Fixed: 2759031
Change-Id: I607ea3c123a7b050403e18f7f1bac2a23e1e585f
Signed-off-by: Jigarkumar Zala <jzala@codeaurora.org>