Add BOOTCOUNT_BOOTLIMIT to set reboot limit

Add ability to set environment bootlimit from Kconfig
Signed-off-by: NAlex Kiernan <alex.kiernan@gmail.com>

drivers/bootcount/Kconfig

@@ -72,6 +72,14 @@ config BOOTCOUNT_AT91
 
 endchoice
 
+config BOOTCOUNT_BOOTLIMIT
+	int "Maximum number of reboot cycles allowed"
+	default 0
+	help
+	  Set the Maximum number of reboot cycles allowed without the boot
+	  counter being cleared.
+	  If set to 0 do not set a boot limit in the environment.
+
 config BOOTCOUNT_ALEN
 	int "I2C address length"
 	default 1

include/env_default.h

@@ -104,6 +104,9 @@ const uchar default_environment[] = {
 	"soc="		CONFIG_SYS_SOC			"\0"
 #endif
 #endif
+#if defined(CONFIG_BOOTCOUNT_BOOTLIMIT) && (CONFIG_BOOTCOUNT_BOOTLIMIT > 0)
+	"bootlimit="	__stringify(CONFIG_BOOTCOUNT_BOOTLIMIT)"\0"
+#endif
 #ifdef	CONFIG_EXTRA_ENV_SETTINGS
 	CONFIG_EXTRA_ENV_SETTINGS
 #endif