drivers: gpio: pca95xx: do not write to output regs if pin is input
drivers: gpio: pca95xx: do not write to output regs if pin is input

Remove unconditional write to PCA95xx output registers in setup_pin_dir,
and only write to output registers if selected pin is configured as
an output.

Fixes #45774

Signed-off-by: Daniel DeGrasse <002dd1d4ac44ebb71088aae93501e62b784ed821@nxp.com>

finikorg/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,galak/zephyr,galak/zephyr,galak/zephyr,finikorg/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr