The pin descriptor should be returned if the name has been found in the
descriptor table. Remove the negation in the if statement for accurate
retrieval.

Fixes: e99ce780 ("pinctrl: realtek: Add common pinctrl driver for Realtek DHC RTD SoCs")
Signed-off-by: Tzuyi Chang <tychang@realtek.com>
Link: https://lore.kernel.org/r/20231121091107.5564-1-tychang@realtek.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>