imx-uuc: bump revision to 79e9798e to fix glibc 2.28 build

Main changes:
- fix build error with glibc 2.28
- re-factor the code
- use unique CPU ID when available
- improve UDC management

Fixes:
http://autobuild.buildroot.net/results/b39d56c1573308c4f947de23363da7c05e2aaf0d/



Also switch back the repository from codeauroraforum to NXPmicro now
that the Qualcomm/NXP merger was denied.

Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>