`phys_addr` is not parsed correctly for IP on the BD root without special characters

[mariodruiz]

I noticed that the rgbleds did not work properly on the ZU for image 3.1 and digging a bit, I noticed that the phys_addr was not parsed correctly. I changed the name to rgb_leds and this fixed the issue. More investigation is needed to understand the root cause. This was working in image 3.0.1

PYNQ-Metadata/pynqmetadata/frontends/hwh_frontend.py

Line 460 in 81950f8

port.baseaddr = int(i.get("BASEVALUE"), 16)

FYI @jogomojo