Add BOOTCOUNT_BOOTLIMIT to set reboot limit

Add ability to set environment bootlimit from Kconfig

Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>
diff --git a/include/env_default.h b/include/env_default.h
index bd600cf..86b639d 100644
--- a/include/env_default.h
+++ b/include/env_default.h
@@ -104,6 +104,9 @@
 	"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