pinctrl: th1520: Update pinmux tables

When Drew took over the pinctrl driver it seems like he didn't use the
git tree I pointed him at and thus missed some important fixes to the
tables describing valid pinmux settings.

The documentation has a nice overview table of these settings but
unfortunately it doesn't fully match the register descriptions, which
seem to be the correct version.

Fixes: bed5cd6f ("pinctrl: Add driver for the T-Head TH1520 SoC")
Signed-off-by: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Reviewed-by: Drew Fustini <dfustini@tenstorrent.com>
Tested-by: Drew Fustini <dfustini@tenstorrent.com>
Link: https://lore.kernel.org/20241011144826.381104-3-emil.renner.berthing@canonical.com


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>