Implement new I2C driver (#531)

Platforms/platform-esp32/bindings/espressif,esp32-i2c-master.yaml

@@ -0,0 +1,29 @@
+description: ESP32 I2C Controller
+
+include: ["i2c-controller.yaml"]
+
+compatible: "espressif,esp32-i2c-master"
+
+properties:
+  port:
+    type: int
+    required: true
+    description: |
+      The port number, defined by i2c_port_t.
+      Depending on the hardware, these values are available: I2C_NUM_0, I2C_NUM_1, LP_I2C_NUM_0
+  clock-frequency:
+    type: int
+    required: true
+    description: Initial clock frequency in Hz
+  clock-source:
+    type: int
+    default: 0
+    description: |
+      Clock source for the I2C peripheral.
+      If not specified, a default clock source will be used.
+  pin-sda:
+    type: phandle-array
+    required: true
+  pin-scl:
+    type: phandle-array
+    required: true

Platforms/platform-esp32/bindings/espressif,esp32-i2c.yaml

@@ -10,7 +10,7 @@ properties:
     required: true
     description: |
       The port number, defined by i2c_port_t.
-      Depending on the hardware, these values are available: I2C_NUM_0, I2C_NUM_1, LP_I2C_NUM_0
+      Depending on the hardware, these values are available: I2C_NUM_0, I2C_NUM_1
   clock-frequency:
     type: int
     required: true