pinctrl: spacemit: fix typo in PRI_TDI pin name

The datasheet lists this signal as PRI_TDI, not PRI_DTI.
Fix the pin name to match the documentation and JTAG naming
convention (TDI = Test Data In).

Signed-off-by: Hendrik Hamerlinck <hendrik.hamerlinck@hammernet.be>
Reviewed-by: Yixun Lan <dlan@gentoo.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>