pinctrl: realtek: Fix logical error when finding descriptor

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.com


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