Add PCA6416A Support (#4681)

tests/test1.yaml

@@ -1449,6 +1449,13 @@ binary_sensor:
       number: 1
       mode: INPUT
       inverted: true
+  - platform: gpio
+    name: PCA6416A binary sensor
+    pin:
+      pca6416a: pca6416a_hub
+      number: 15
+      mode: INPUT
+      inverted: true
   - platform: gpio
     name: MCP21 binary sensor
     pin:
@@ -2934,6 +2941,11 @@ pca9554:
     address: 0x3F
     i2c_id: i2c_bus
 
+pca6416a:
+  - id: pca6416a_hub
+    address: 0x21
+    i2c_id: i2c_bus
+
 mcp23017:
   - id: mcp23017_hub
     open_drain_interrupt: true