pinctrl: Join split messages and remove double whitespace

Splitting error messages across multiple lines makes it harder to find
them in the kernel sources.  Fix this by joining the messages.
Remove double whitespace (end of first line + begin of second line).

Fixes: 1c8e7944 ("pinctrl: improve warning messages")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/c8e3feeedbf42a130936a5afaea0f129bcda51f6.1724938156.git.geert+renesas@glider.be


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