pinctrl: cy8c95x0: Transform to cy8c95x0_regmap_read_bits()

pinctrl: cy8c95x0: Transform to cy8c95x0_regmap_read_bits()

The returned value of cy8c95x0_regmap_read() is used always with
a bitmask being applied. Move that bitmasking code into the function.
At the same time transform it to cy8c95x0_regmap_read_bits() which
will be in align with the write and update counterparts.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/20250205095243.512292-4-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>