pinctrl: cy8c95x0: Don't use cy8c95x0_set_mode() twice

Instead, call it once in cy8c95x0_pinmux_mode() and if selector is 0,
shortcut the flow by returning 0 immediately.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20221018151223.80846-1-andriy.shevchenko@linux.intel.com


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