uart: Ingore pl011 historic mistakes

[imp]

Summary

Some veresions of EDK-II and QEMU reported the wrong values for the
register shift and the region I/O size. Detect those and set it to the
correct values. In general, anything other than a shift of 2 and a
regio width of 4 (bytes, or 32 bits) is a mistake. However, allow
for overrides in the future by only overriding the buggy values.
Otherwise, we will fail to boot.

PR: 282936
Sponsored by: Netflix

[mp]

Verified via:

1. Installed 15-current on UTM 4.6.3 (qemu 9.2) and rebooted fine.
2. Rebooted under UTM 4.5.4 and it failed per the bug (this was expected).
3. Rebooted with 4.6.3, rebuilt/installed kernel with patches (needed tweaks).
4. Patched kernel boots fine using both UTM 4.5.4 and 4.6.3.

sys/dev/uart/uart_dev_pl011.c

176

s/reproted/reported/

177

s/tabe/tabel/

178

s/QEMu/QEMU/

185

s/Quriks/Quirks/

191

s/regshift/regshft/ on this and the next line.

[imp]

Fix per feedbac

[imp]

OK. This should be good to go.

sys/dev/uart/uart_dev_pl011.c

191

Yea, the version I had on my arm box had this, but I forgot to back-patch it for the first round.