gpio: pca953x: use the correct register address when regcache sync during init

For regcache_sync_region, we need to use pca953x_recalc_addr() to get
the real register address.

Fixes: ec82d1eb ("gpio: pca953x: Zap ad-hoc reg_output cache")
Fixes: 0f25fda8

 ("gpio: pca953x: Zap ad-hoc reg_direction cache")
Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>