Intel
Intel's purchase of Infineon places it in the top 5 GSM chipset providers (I believe).
A quick deal by Qualcomm buying access to Intel's fabs is likely in order. A goodwill gesture to bundle Intel's modem with a Krait (aarch64-variety) would do much to assuage the regulatory anger. Some careful Qualcomm engineering attention to Intel's discrete modem chip that brings the GSM performance closer to Snapdragon would likely satisfy Apple.
Qualcomm has the power to broaden access to mobile - their CDMA patents lock them as to sole supplier for Verizon, Sprint, and U.S. Cellular. Regulators are demanding "coopetetion," and this is not unreasonable. Qualcomm needs to execute on monetizing their patent portfolio in a way that is friendly to all market segments and allows competitors to survive.