msm: camera: cci: reset reinit completion on read

Reinit completion rd_done completion variable before each read so that
the rd_done completion variable state will be clean .

CRs-Fixed: 2736884
Change-Id: I2cd7350da8e8270c1cd9238dec0eec9f84360899
Signed-off-by: Tony Lijo Jose <tjose@codeaurora.org>