Convert CONFIG_BOOTCOUNT_ENV to Kconfig

This converts the following to Kconfig:
  CONFIG_BOOTCOUNT_ENV

Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
diff --git a/README b/README
index b227d8e..4478bad 100644
--- a/README
+++ b/README
@@ -713,17 +713,6 @@
 		as a convenience, when switching between booting from
 		RAM and NFS.
 
-- Bootcount:
-		CONFIG_BOOTCOUNT_ENV
-		If no softreset save registers are found on the hardware
-		"bootcount" is stored in the environment. To prevent a
-		saveenv on all reboots, the environment variable
-		"upgrade_available" is used. If "upgrade_available" is
-		0, "bootcount" is always 0, if "upgrade_available" is
-		1 "bootcount" is incremented in the environment.
-		So the Userspace Applikation must set the "upgrade_available"
-		and "bootcount" variable to 0, if a boot was successfully.
-
 - Pre-Boot Commands:
 		CONFIG_PREBOOT
 
diff --git a/configs/draco_defconfig b/configs/draco_defconfig
index 05b1b9e..985e662 100644
--- a/configs/draco_defconfig
+++ b/configs/draco_defconfig
@@ -56,6 +56,7 @@
 CONFIG_BOOTP_GATEWAY=y
 CONFIG_BOOTP_SUBNETMASK=y
 CONFIG_BOOTCOUNT_LIMIT=y
+CONFIG_BOOTCOUNT_ENV=y
 CONFIG_DFU_NAND=y
 CONFIG_MMC_OMAP_HS=y
 CONFIG_NAND=y
diff --git a/configs/etamin_defconfig b/configs/etamin_defconfig
index a9234ee..dd862bb 100644
--- a/configs/etamin_defconfig
+++ b/configs/etamin_defconfig
@@ -56,6 +56,7 @@
 CONFIG_BOOTP_GATEWAY=y
 CONFIG_BOOTP_SUBNETMASK=y
 CONFIG_BOOTCOUNT_LIMIT=y
+CONFIG_BOOTCOUNT_ENV=y
 CONFIG_DFU_NAND=y
 CONFIG_MMC_OMAP_HS=y
 CONFIG_NAND=y
diff --git a/configs/pxm2_defconfig b/configs/pxm2_defconfig
index e689d0f..98edb88 100644
--- a/configs/pxm2_defconfig
+++ b/configs/pxm2_defconfig
@@ -59,6 +59,7 @@
 CONFIG_BOOTP_GATEWAY=y
 CONFIG_BOOTP_SUBNETMASK=y
 CONFIG_BOOTCOUNT_LIMIT=y
+CONFIG_BOOTCOUNT_ENV=y
 CONFIG_DFU_NAND=y
 CONFIG_MMC_OMAP_HS=y
 CONFIG_NAND=y
diff --git a/configs/rastaban_defconfig b/configs/rastaban_defconfig
index 93e909c..e561edc 100644
--- a/configs/rastaban_defconfig
+++ b/configs/rastaban_defconfig
@@ -56,6 +56,7 @@
 CONFIG_BOOTP_GATEWAY=y
 CONFIG_BOOTP_SUBNETMASK=y
 CONFIG_BOOTCOUNT_LIMIT=y
+CONFIG_BOOTCOUNT_ENV=y
 CONFIG_DFU_NAND=y
 CONFIG_MMC_OMAP_HS=y
 CONFIG_NAND=y
diff --git a/configs/rut_defconfig b/configs/rut_defconfig
index 9c879a9..e09f4c5 100644
--- a/configs/rut_defconfig
+++ b/configs/rut_defconfig
@@ -60,6 +60,7 @@
 CONFIG_BOOTP_GATEWAY=y
 CONFIG_BOOTP_SUBNETMASK=y
 CONFIG_BOOTCOUNT_LIMIT=y
+CONFIG_BOOTCOUNT_ENV=y
 CONFIG_DFU_NAND=y
 CONFIG_MMC_OMAP_HS=y
 CONFIG_NAND=y
diff --git a/configs/thuban_defconfig b/configs/thuban_defconfig
index 197abde..eb7e285 100644
--- a/configs/thuban_defconfig
+++ b/configs/thuban_defconfig
@@ -56,6 +56,7 @@
 CONFIG_BOOTP_GATEWAY=y
 CONFIG_BOOTP_SUBNETMASK=y
 CONFIG_BOOTCOUNT_LIMIT=y
+CONFIG_BOOTCOUNT_ENV=y
 CONFIG_DFU_NAND=y
 CONFIG_MMC_OMAP_HS=y
 CONFIG_NAND=y
diff --git a/drivers/bootcount/Kconfig b/drivers/bootcount/Kconfig
index e905295..40a0755 100644
--- a/drivers/bootcount/Kconfig
+++ b/drivers/bootcount/Kconfig
@@ -28,6 +28,18 @@
 	  This requires the RTC clocks, etc, to be enabled prior to use and
 	  not all boards with this IP block on it will have the RTC in use.
 
+config BOOTCOUNT_ENV
+	bool "Boot counter in environment"
+	help
+	  If no softreset save registers are found on the hardware
+	  "bootcount" is stored in the environment. To prevent a
+	  saveenv on all reboots, the environment variable
+	  "upgrade_available" is used. If "upgrade_available" is
+	  0, "bootcount" is always 0, if "upgrade_available" is
+	  1 "bootcount" is incremented in the environment.
+	  So the Userspace Application must set the "upgrade_available"
+	  and "bootcount" variable to 0, if a boot was successfully.
+
 endchoice
 
 config SYS_BOOTCOUNT_SINGLEWORD
diff --git a/include/configs/siemens-am33x-common.h b/include/configs/siemens-am33x-common.h
index 15dfeec..0e77ccb 100644
--- a/include/configs/siemens-am33x-common.h
+++ b/include/configs/siemens-am33x-common.h
@@ -490,6 +490,4 @@
 #define CONFIG_RESET_TO_RETRY
 #define CONFIG_BOOT_RETRY_TIME 60
 
-#define CONFIG_BOOTCOUNT_ENV
-
 #endif	/* ! __CONFIG_SIEMENS_AM33X_COMMON_H */
diff --git a/scripts/config_whitelist.txt b/scripts/config_whitelist.txt
index 58a74e0..80a3876 100644
--- a/scripts/config_whitelist.txt
+++ b/scripts/config_whitelist.txt
@@ -146,7 +146,6 @@
 CONFIG_BOOGER
 CONFIG_BOOTBLOCK
 CONFIG_BOOTCOUNT_ALEN
-CONFIG_BOOTCOUNT_ENV
 CONFIG_BOOTCOUNT_I2C
 CONFIG_BOOTCOUNT_RAM
 CONFIG_BOOTFILE