Add prints of read dt props

[ichernev]

For some vendors, the DT properties differ a lot from what is expected by the script. Print all properties that are read, to ease with debugging/porting vendor DT to script-compatible DT.

I guess all prints can be enabled/disabled with a cmd option? Let me know.

[qwertyuiopzxcvbnmlkjhgfdsa1]

Thanks for your patch, without it i wouldn't be able to generate driver

[stephan-gh]

I added something that properly prints failing properties: https://github.com/msm8916-mainline/linux-mdss-dsi-panel-driver-generator/commit/e7dd1650786ed990bf47fe080c9a44fcce240e83 which should be mostly equivalent I hope.