net: iface: Fix bad comparisons in net_if

Fix comparisons in net_if_get_by_index and net_if_get_by_iface:
__net_if_end is not a pointer to a net_if structure.

Change-Id: Ie8e3a457c3f0fa97c080b38b5b7d2b420c50252b
Signed-off-by: Julien Chevrier <julien.chevrier@intel.com>
1 file changed