More Qualcomm driver updates for 5.13 This improves the Qualcomm SCM driver logic related to detecting the calling convention, in particular on SC7180, and fixes a few small issues in the same. It introduces additonal sanity checks of the size of loaded segments in the MDT loader and adds a missing error in the return path of pdr_register_listener(). It makes it possible to specify the OEM specific firmware path in the wcn36xx control (and WiFi) driver. Lastly it adds a missing path specifier in the MAINTAINERS' entry and fixes a bunch of kerneldoc issues in various drivers.