net: net_context: state setting is a value not individual bits

The state of a net context is checked as a whole value (not individual
bits).  Currently, the net_context_set_state function is adding the
passed in flags to the existing value.  This is incorrect.

Change-Id: Ieba6b9dfc35537745b14c50a2ccb115c6976c001
Signed-off-by: Michael Scott <michael.scott@linaro.org>
1 file changed