gobi_cdma_modem: reject connect requests while activating

Reject connect requests while the modem is activating.  It is a bad
idea to try to connect while the modem is in the middle of doing
OTA-SP.

BUG=chromium-os:20204
TEST=run through activation process

Change-Id: If22cdcdfd51cb47a1348513d6ff16f5f294268dd
Reviewed-on: https://gerrit-int.chromium.org/6547
Reviewed-by: Jason Glasgow <jglasgow@google.com>
Tested-by: Jason Glasgow <jglasgow@google.com>
2 files changed