[qtbase] Backport proper EGLFS_KMS initialization. Fixes JB#52239
Backports some fixes for EGLFS from Qt 5.7, namely fix for QTBUG-60330 and commit 091a386, enabling correct initialization for the Mali 628 proprietary drivers (and potentially others) with the following error:
[F] unknown:0 - Could not open egl display.
This only affects hybris-less devices. It doesn't change behavior on other hybris-less devices that doesn't suffer from that problem (i.e. PinePhone).