drivers: gpio: rename PCAL9535A to PCA95XX

PCA95XX is a series of compatible I2C-based GPIO expanders,
with common registers on input/output, polarity and configuration.
This renames the original PCAL9535A driver to PCA95XX to indicate
that it can support this series. Additional features on variants
are guarded by kconfigs.

Signed-off-by: Daniel Leung <daniel.leung@intel.com>
7 files changed