Add Qt5 integration for qt demo image

Eberhard Stollrequested to merge
feature/sto/dunfell-bl-scope into develop-dunfell
  • Adds Qt5 demo images image-ktn-qt, image-ktn-qt-swu and swupdate-img-qt package
  • Adds Qt configuration for Kontron demo
    • Enabled QPA features: linuxfb and eglfs
    • Enabled EGLFS integration: eglfs_kms, eglfs_viv
  • Increases GPU clock in tf-a from 264MHz to 528MHz

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