[rt-smart] testcase & improvements for memory management (#7099)

* [utest/mm] add testcase for create/init
format codes of create/init in components/mm

* [libcpu/aarch64] fix user stack check routine

* [kservice] export API for utest

* [utest/mm] testcase for aspace_map
format & modify the files under components/mm related with aspace_map

* [lwp/user_mm] add user_map_varea for mmap feature

* [mm] rename rt_mm_fault_try_fix to rt_aspace_fault_try_fix

* [utest/mm] testcase for synchronization

* [mm] modify unmap api to improve throughput

* [utest/mm] testcases for cache and varea map

* [format] remove extra space

* [utest/mm] fix testcase problem in header

* [lwp] extend map_user_varea with a flag

* [utest/mm] testcase for lwp_map_user_varea

* [libcpu/arm/cortex-a] fix kernel space layout

* [utest/mm] adjust for armv7 arch

examples/utest/testcases/mm/SConscript

@@ -0,0 +1,16 @@
+Import('rtconfig')
+from building import *
+
+cwd     = GetCurrentDir()
+src     = []
+CPPPATH = [cwd]
+
+if GetDepend(['UTEST_MM_API_TC']):
+    src += ['mm_api_tc.c', 'mm_libcpu_tc.c']
+
+if GetDepend(['UTEST_MM_LWP_TC']):
+    src += ['mm_lwp_tc.c']
+
+group = DefineGroup('utestcases', src, depend = ['RT_USING_UTESTCASES'], CPPPATH = CPPPATH)
+
+Return('group')