drivers: i3c: npcx: introduce NPCX I3C driver

This implements basic driver to utilize the I3C IP block
on NPCX.

1. I3C mode: Main controller mode only.
2. Transfer: Support SDR only.
3. IBI: Support Hot-Join, IBI(MDB).
   Controller request is not supported.
4. Support 3 I3C modules:
   I3C1(3.3V), I3C2(1.8V, espi mode), (I3C3 1.8V or 3.3V)

Signed-off-by: Alvis Sun <yfsun@nuvoton.com>

dts/bindings/i3c/nuvoton,npcx-i3c.yaml

@@ -0,0 +1,52 @@
+# Copyright (c) 2024 Nuvoton Technology Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+description: |
+    Nuvoton I3C controller
+
+    Representation:
+
+    /* If CONFIG_I3C_NPCX is enabled, the suggested clock configuration is as follows: */
+    &pcc {
+      clock-frequency = <DT_FREQ_M(90)>; /* OFMCLK runs at 90MHz */
+      core-prescaler = <3>; /* CORE_CLK runs at 30MHz */
+      apb1-prescaler = <6>; /* APB1_CLK runs at 15MHz */
+      apb2-prescaler = <6>; /* APB2_CLK runs at 15MHz */
+      apb3-prescaler = <6>; /* APB3_CLK runs at 15MHz */
+      apb4-prescaler = <3>; /* APB4_CLK runs at 30MHz */
+    };
+
+    &rst {
+      status = "okay";
+    };
+
+    &i3c0 {
+      status = "okay";
+
+      /* I3C clock frequency suggestion = <PP_SCL, OD_SCL> */
+       * Full speed = <12500000, 4170000>
+       * Normal speed = <7500000, 1500000>
+       */
+      i3c-scl-hz = <12500000>;
+      i3c-od-scl-hz = <4170000>;
+    };
+
+compatible: "nuvoton,npcx-i3c"
+
+include: [i3c-controller.yaml, pinctrl-device.yaml, reset-device.yaml]
+
+properties:
+  reg:
+    required: true
+
+  interrupts:
+    required: true
+
+  resets:
+    required: true
+
+  i3c-od-scl-hz:
+    type: int
+    description: |
+      Open Drain Frequency for the I3C controller. When undefined, use
+      the controller default or as specified by the I3C specification.