diag: Add status field in response packet

DIAG driver responds to "diasble logging" command. The
response should have a status field, which was missing
until now. This change adds the missing field.

Change-Id: Idbea6662b9761374a596dd28421a2ae2fac41133
CRs-Fixed: 384181
Signed-off-by: Shalabh Jain <shalabhj@codeaurora.org>