input: convert the Nuvoton npcx keyboard scan driver to input

Convert the NPCX keyboard scan driver to the input subsystem and add the
input to kscan compatibility driver to maintain functionality with the
current API.

Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>

dts/bindings/kscan/nuvoton,npcx-kscan.yaml

@@ -1,63 +0,0 @@
-# Copyright (c) 2022 Nuvoton Technology Corporation.
-# SPDX-License-Identifier: Apache-2.0
-
-description: Nuvoton, NPCX keyboard scan controller
-
-compatible: "nuvoton,npcx-kscan"
-
-include: [kscan.yaml, pinctrl-device.yaml]
-
-properties:
-  reg:
-    required: true
-
-  clocks:
-    required: true
-
-  pinctrl-0:
-    required: true
-
-  pinctrl-names:
-    required: true
-
-  wui-maps:
-    type: phandles
-    required: true
-    description: |
-        Mapping table between Wake-Up Input (WUI) and KSIs.
-
-        For example the WUI mapping on 8 KSI pads would be
-           wui-maps = <&wui_io30 &wui_io31 &wui_io27 &wui_io26
-                       &wui_io25 &wui_io24 &wui_io23 &wui_io22>;
-
-  row-size:
-    type: int
-    default: 8
-    required: true
-    description: |
-        The row size is used in the keyboard matrix.
-        valid range: 1 - 8
-
-  col-size:
-    type: int
-    default: 18
-    required: true
-    description: |
-        The column size is used in the keyboard matrix.
-        valid range: 1 - 18
-
-  debounce-down-ms:
-    type: int
-    default: 10
-    description: Determines the time in msecs for debouncing a key press.
-
-  debounce-up-ms:
-    type: int
-    default: 20
-    description: Determines the time in msecs for debouncing a key release.
-
-  no-ghostkey-check:
-    type: boolean
-    description: |
-        Ignore the ghost key checking in the driver if the diodes are used
-        in the matrix hardware.