diag: Set real time value correctly

Diag user space clients sends an IOCTL to get the real time value
from the driver. The driver was setting this value incorrectly. This
patch fixes this issue.

Change-Id: Ia9ff16e5b1affc05bb0f99b32e97fa80ec25aa14
Signed-off-by: Ravi Aravamudhan <aravamud@codeaurora.org>