Switch --enable-libdm365 added to configure script
libdm365_enc: correct handling of various frame pitch
dm365 codecs fixes

- correct frame type handling (setting key_frame flag)
- error logging
- time base for h264: timeScale/numUnitsInTicks is field rate (fps*2)
dm365 jpeg encoder added

- proper checks added to configure script also for h264
dm365: fixed long name for jpeg encoder
dm365: mpeg4 encoder
Add xdc dependencies into ffmpeg configure script

This commit simplifies building of the ffmpeg with dm365 codecs,
there is no need to specify DVSDK include paths and libraries manually now.

- added --dvsdk-dir option specifiing path to TI libraries
- configure will now run make -f Makefile.xdc when libdm365 is enabled