pinctrl: single: fix debug output when #pinctrl-cells = 2

The debug output in pcs_parse_one_pinctrl_entry() needs to be updated
to print the correct pinctrl register value when #pinctrl-cells is 2.

Fixes: a1339541 ("pinctrl: single: parse #pinctrl-cells = 2")
Reported-by: Trent Piepho <tpiepho@gmail.com>
Signed-off-by: Drew Fustini <drew@beagleboard.org>
Acked-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/linux-omap/3139716.CMS8C0sQ7x@zen.local/
Link: https://lore.kernel.org/r/20200913230306.2061645-1-drew@beagleboard.org


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