gpio: pca953x: use the correct register address to do regcache sync

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

Fixes: b7657430 ("gpio: pca953x: Restore registers after suspend/resume cycle")
Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>