ITE: drivers/i2c: I2C driver divided into two compatibles

As mentioned in zephyrproject-rtos#42882, the I2C of IT8XXX2 is designed for two different
IP blocks, so this PR divides this I2C driver into two compatibles.

Signed-off-by: Tim Lin <[email protected]>

CODEOWNERS

@@ -278,6 +278,7 @@
 /drivers/hwinfo/                          @alexanderwachter
 /drivers/i2c/i2c_common.c                 @sjg20
 /drivers/i2c/i2c_emul.c                   @sjg20
+/drivers/i2c/i2c_ite_enhance.c            @GTLin08
 /drivers/i2c/i2c_ite_it8xxx2.c            @GTLin08
 /drivers/i2c/i2c_shell.c                  @nashif
 /drivers/i2c/Kconfig.i2c_emul             @sjg20

drivers/i2c/CMakeLists.txt

@@ -11,6 +11,7 @@ zephyr_library_sources_ifdef(CONFIG_I2C_CC32XX		i2c_cc32xx.c)
 zephyr_library_sources_ifdef(CONFIG_I2C_ESP32		i2c_esp32.c)
 zephyr_library_sources_ifdef(CONFIG_I2C_GPIO		i2c_gpio.c)
 zephyr_library_sources_ifdef(CONFIG_I2C_ITE_IT8XXX2		i2c_ite_it8xxx2.c)
+zephyr_library_sources_ifdef(CONFIG_I2C_ITE_ENHANCE		i2c_ite_enhance.c)
 zephyr_library_sources_ifdef(CONFIG_I2C_IMX		i2c_imx.c)
 zephyr_library_sources_ifdef(CONFIG_I2C_LPC11U6X        i2c_lpc11u6x.c)
 zephyr_library_sources_ifdef(CONFIG_I2C_XEC		i2c_mchp_xec.c)

drivers/i2c/Kconfig.it8xxx2

@@ -1,10 +1,22 @@
 # Copyright (c) 2020 ITE Corporation. All Rights Reserved.
 # SPDX-License-Identifier: Apache-2.0
 
+DT_COMPAT_ITE_IT8XXX2_I2C := ite,it8xxx2-i2c
+DT_COMPAT_ITE_ENHANCE_I2C := ite,enhance-i2c
+
 config I2C_ITE_IT8XXX2
 	bool "ITE IT8XXX2 I2C driver"
 	depends on SOC_IT8XXX2
+	default $(dt_compat_enabled,$(DT_COMPAT_ITE_IT8XXX2_I2C))
 	help
 	  Enable I2C support on it8xxx2_evb.
 	  Supported Speeds: 100kHz, 400kHz and 1MHz.
 	  This driver supports repeated start.
+
+config I2C_ITE_ENHANCE
+	bool "ITE IT8XXX2 I2C enhance driver"
+	depends on SOC_IT8XXX2
+	default $(dt_compat_enabled,$(DT_COMPAT_ITE_ENHANCE_I2C))
+	help
+	  This option can enable the enhance I2C
+	  of IT8XXX2 and support three channels.