@Helio-Machado , I am having the exact same issue:
spidev spi32766.1: buggy DT: spidev listed directly in DT, then the stack trace followed by complete device lockup. I'm also using the Power Dock with a 1400mAh 1-cell LiPo. It worked fine initially and I think it started happening after I flashed the latest firmware version.
Re-flashing the LEDE image doesn't seem to have any effect. Plugging in the charging cable maybe has some effect -- with power plugged in it seems to work most of the times. Still, Power Dock is unusable.