refactor: Move drivers into properly module.

* Align our driver module layout to properly match Zephyr conventions,
  allowing proper CMake setup to amend the library for each type of driver.

app/module/dts/bindings/sensor/alps,ec11.yaml

@@ -0,0 +1,26 @@
+description: |
+  Sensor driver for the Alps EC11 rotary encoder
+
+compatible: "alps,ec11"
+
+properties:
+  label:
+    type: string
+    required: true
+  a-gpios:
+    type: phandle-array
+    required: true
+    description: A pin for the encoder
+  b-gpios:
+    type: phandle-array
+    required: true
+    description: A pin for the encoder
+  resolution:
+    type: int
+    description: Number of pulses per tick
+    deprecated: true
+    required: false
+  steps:
+    type: int
+    description: Number of pulses in one full rotation
+    required: false

app/module/dts/bindings/sensor/zmk,battery-nrf-vddh.yaml

@@ -0,0 +1,6 @@
+# Copyright (c) 2021 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+description: Battery SoC monitoring using nRF VDDH
+
+compatible: "zmk,battery-nrf-vddh"

app/module/dts/bindings/sensor/zmk,battery-voltage-divider.yaml

@@ -0,0 +1,8 @@
+# Copyright (c) 2020 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+description: Battery SoC monitoring using voltage divider
+
+compatible: "zmk,battery-voltage-divider"
+
+include: voltage-divider.yaml