ARM: dts: omap: dm816x: Correct pinctrl register

ARM: dts: omap: dm816x: Correct pinctrl register

The declaration in the pinmux device for the pinctrl registers is not
correct. These registers are actually 32 bits wide, not 16. Also the
mask for functional bits is also wrong. Functional bits are 0-4, not
0-3. So the mask needs to changed to 0x1f.

This information is taken from the TMS320DM816x DaVinci
Digital Media Processors Technical Reference Manual.
SPRUGX8C March 2015

Signed-off-by: Andrew Goodbody <andrew.goodbody@linaro.org>
Reviewed-by: Christopher Obbard <christopher.obbard@linaro.org>
Tested-by: Christopher Obbard <christopher.obbard@linaro.org>
Link: https://patch.msgid.link/20260312-dm816x_dt-v1-1-ed3370b20799@linaro.org
[khilman: fix minor typo: s/delcaration/declaration/]
Signed-off-by: Kevin Hilman <khilman@baylibre.com>