Comment should depend on AT91 bootstrap beeing built

target/device/Atmel/at91bootstrap/Config.in

@@ -80,4 +80,5 @@ config	BR2_AT91BOOTSTRAP_JUMP_ADDR
 	depends on BR2_TARGET_AT91BOOTSTRAP
 
 comment "It will be copied to $(BR2_AT91BOOTSTRAP_JUMP_ADDR)"
+	depends on BR2_TARGET_AT91BOOTSTRAP