Update rp2040-hal to v0.10

[jannic]

Not yet tested. But I trust in rust - if it compiles, it works :-)

[thejpster]

I shall try it out, and measure the VGA timing to see if we lost any performance :)

Also - note to self - try with -Ctarget-cpu=cortex-m0plus because it seems to make some different choices about instruction ordering that might work out better.

[thejpster]

Tested OK on hardware. Haven't had a chance to check the difference in video timing. Not much I expect - that code doesn't do any I/O, only writes to a shared RAM buffer.