Convert CONFIG_CMD_PCMCIA to Kconfig

This converts the following to Kconfig:
   CONFIG_CMD_PCMCIA

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>
diff --git a/README b/README
index 56fc476..17c055a 100644
--- a/README
+++ b/README
@@ -812,7 +812,6 @@
 		CONFIG_CMD_MII		* MII utility commands
 		CONFIG_CMD_NET		  bootp, tftpboot, rarpboot
 		CONFIG_CMD_NFS		  NFS support
-		CONFIG_CMD_PCMCIA		* PCMCIA support
 		CONFIG_CMD_PING		* send ICMP ECHO_REQUEST to network
 					  host
 		CONFIG_CMD_PORTIO	* Port I/O
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 8fab42d..ef614a6 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -741,6 +741,14 @@
 	  peripherals. Sub-commands allow bus enumeration, displaying and
 	  changing configuration space and a few other features.
 
+config CMD_PCMCIA
+	bool "pinit - Set up PCMCIA device"
+	help
+	  Provides a means to initialise a PCMCIA (Personal Computer Memory
+	  Card International Association) device. This is an old standard from
+	  about 1990. These devices are typically removable memory or network
+	  cards using a standard 68-pin connector.
+
 config CMD_REMOTEPROC
 	bool "remoteproc"
 	depends on REMOTEPROC
diff --git a/configs/ms7720se_defconfig b/configs/ms7720se_defconfig
index 7f137fa..a9e3f45 100644
--- a/configs/ms7720se_defconfig
+++ b/configs/ms7720se_defconfig
@@ -15,6 +15,7 @@
 # CONFIG_CMD_LOADB is not set
 # CONFIG_CMD_LOADS is not set
 # CONFIG_CMD_FPGA is not set
+CONFIG_CMD_PCMCIA=y
 # CONFIG_CMD_ECHO is not set
 # CONFIG_CMD_ITEST is not set
 # CONFIG_CMD_SOURCE is not set
diff --git a/include/config_cmd_all.h b/include/config_cmd_all.h
index b1f6990..a008bac 100644
--- a/include/config_cmd_all.h
+++ b/include/config_cmd_all.h
@@ -13,7 +13,6 @@
  * Alphabetical list of all possible commands.
  */
 
-#define CONFIG_CMD_PCMCIA	/* PCMCIA support		*/
 #define CONFIG_CMD_PORTIO	/* Port I/O			*/
 #define CONFIG_CMD_REGINFO	/* Register dump		*/
 #define CONFIG_CMD_REISER	/* Reiserfs support		*/
diff --git a/include/configs/dbau1x00.h b/include/configs/dbau1x00.h
index 970e214..cd65cea 100644
--- a/include/configs/dbau1x00.h
+++ b/include/configs/dbau1x00.h
@@ -67,11 +67,6 @@
  * Command line configuration.
  */
 
-#ifdef CONFIG_DBAU1550
-
-#undef CONFIG_CMD_PCMCIA
-#endif
-
 /*
  * Miscellaneous configurable options
  */
diff --git a/include/configs/ms7720se.h b/include/configs/ms7720se.h
index 86b93a3..112145c 100644
--- a/include/configs/ms7720se.h
+++ b/include/configs/ms7720se.h
@@ -13,7 +13,6 @@
 #define CONFIG_MS7720SE		1
 
 #define CONFIG_CMD_SDRAM
-#define CONFIG_CMD_PCMCIA
 
 #define CONFIG_BOOTARGS		"console=ttySC0,115200"
 #define CONFIG_BOOTFILE		"/boot/zImage"
diff --git a/scripts/config_whitelist.txt b/scripts/config_whitelist.txt
index b2f50c0..358b17c 100644
--- a/scripts/config_whitelist.txt
+++ b/scripts/config_whitelist.txt
@@ -293,7 +293,6 @@
 CONFIG_CMDLINE_EDITING
 CONFIG_CMDLINE_PS_SUPPORT
 CONFIG_CMDLINE_TAG
-CONFIG_CMD_PCMCIA
 CONFIG_CMD_PORTIO
 CONFIG_CMD_READ
 CONFIG_CMD_REGINFO