* Add AppletAE, step 1: move common interfaces to am.h

* Add AppletAE, step 2

sfdnsres: Add several stubs

* Updated the audout:u and IAudioOut, now it might work with RetroArch without trigger an assert, however it's not the ideal implementation

* Updated the audout:u and IAudioOut, now it might work with RetroArch without trigger an assert, however it's not the ideal implementation

* audout:u OpenAudioOut implementation and IAudioOut cmd 1,2,3,4,5 implementation

* using an enum for audio_out_state as well as changing its initialize to member initializer list

* Minor fixes, added Service_Audio for LOG_*, changed PcmFormat enum to EnumClass

* Minor fixes, added Service_Audio for LOG_*, changed PcmFormat enum to EnumClass

* added missing Audio loggin subclass, minor fixes, clang comment breakline

* Solving backend logging conflict

* minor fix

* Fixed duplicated Service NVDRV in backend.cpp, my bad

This function is used by libnx to obtain a new layer.

It'll be needed when we implement CreateManagedDisplayLayer.

It is now created during Service initialization and passed to all the services that need it.

* stubs for audout:u, audin:u, audrec:u, audren:u, codecctl and decoding tables with nullptr for future implementations

* fixing the changes requested (remove private, explicit)

* Added nvmemp, Added /dev/nvhost-ctrl, SetClientPID now stores pid

* used clang-format-3.9 instead

* lowercase pid

* Moved nvmemp handlers to cpp

* Removed unnecessary logging for NvOsGetConfigU32. Cleaned up log and changed to LOG_DEBUG

* using std::arrays instead of c arrays

* nvhost get config now uses std::array completely

* added pid logging back

* updated cmakelist

* missing includes

* added array, removed memcpy

* clang-format6.0