Convert CONFIG_CMD_TCA642X to Kconfig

This converts the following to Kconfig:
   CONFIG_CMD_TCA642X

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>

configs/omap5_uevm_defconfig

@@ -36,6 +36,7 @@ CONFIG_CMD_FS_GENERIC=y
 CONFIG_ISO_PARTITION=y
 CONFIG_DFU_MMC=y
 CONFIG_DFU_RAM=y
+CONFIG_CMD_TCA642X=y
 CONFIG_MMC_OMAP_HS=y
 CONFIG_SCSI=y
 CONFIG_SYS_NS16550=y

drivers/gpio/Kconfig

@@ -165,6 +165,15 @@ config SANDBOX_GPIO_COUNT
 	  of 'anonymous' GPIOs that do not belong to any device or bank.
 	  Select a suitable value depending on your needs.
 
+config CMD_TCA642X
+	bool "tca642x - Command to access tca642x state"
+	help
+	  DEPRECATED - This needs conversion to driver model
+
+	  This provides a way to looking at the pin state of this device.
+	  This mirrors the 'gpio' command and that should be used in preference
+	  to custom code.
+
 config TEGRA_GPIO
 	bool "Tegra20..210 GPIO driver"
 	depends on DM_GPIO

include/configs/omap5_uevm.h

@@ -46,7 +46,6 @@
 
 /* Required support for the TCA642X GPIO we have on the uEVM */
 #define CONFIG_TCA642X
-#define CONFIG_CMD_TCA642X
 #define CONFIG_SYS_I2C_TCA642X_BUS_NUM 4
 #define CONFIG_SYS_I2C_TCA642X_ADDR 0x22
 

scripts/config_whitelist.txt

@@ -293,7 +293,6 @@ CONFIG_CM922T_XA10
 CONFIG_CMDLINE_EDITING
 CONFIG_CMDLINE_PS_SUPPORT
 CONFIG_CMDLINE_TAG
-CONFIG_CMD_TCA642X
 CONFIG_CMD_TERMINAL
 CONFIG_CMD_TFTP
 CONFIG_CMD_THOR_DOWNLOAD