cmake(bugfix):do not set nuttx_add_app NAME as required

Instead, use direct return, because in non-build targets,
such as savedefconfig, menuconfig, this check is unnecessary

Signed-off-by: xuxin19 <xuxin19@xiaomi.com>

cmake/nuttx_add_application.cmake

@@ -104,11 +104,13 @@ function(nuttx_add_application)
     DEFINITIONS
     OPTIONS
     NO_MAIN_ALIAS
-    REQUIRED
-    NAME
     ARGN
     ${ARGN})
 
+  if(NOT NAME)
+    return()
+  endif()
+
   # check if SRCS exist
   if(SRCS)
     file(GLOB SRCS_EXIST ${SRCS})