feat(build): support Kconfig

Kconfig usages are the same with liteos_a

Signed-off-by: Caoruihong <crh.cao@huawei.com>
Change-Id: I9aacbb69da88d5427cced89d1a49cb1041afa998

components/fs/fatfs/BUILD.gn

@@ -27,25 +27,21 @@
 # OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 # ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-static_library("fatfs") {
+import("//kernel/liteos_m/liteos.gni")
+
+module_switch = defined(LOSCFG_FS_FAT)
+module_name = get_path_info(rebase_path("."), "name")
+kernel_module(module_name) {
   sources = [
-    "//third_party/FatFs/source/diskio.c",
-    "//third_party/FatFs/source/ff.c",
-    "//third_party/FatFs/source/ffsystem.c",
-    "//third_party/FatFs/source/ffunicode.c",
+    "$LITEOSTHIRDPARTY/FatFs/source/diskio.c",
+    "$LITEOSTHIRDPARTY/FatFs/source/ff.c",
+    "$LITEOSTHIRDPARTY/FatFs/source/ffsystem.c",
+    "$LITEOSTHIRDPARTY/FatFs/source/ffunicode.c",
     "fatfs.c",
   ]
-
-  include_dirs = [
-    "../",
-    "../../../kernel/arch/include",
-    "../../../kernel/include",
-    "../../../utils",
-    "../../../kal/cmsis",
-    "../../../kal/posix/include",
-    "//third_party/bounds_checking_function/include",
-    "//third_party/FatFs/source/",
-  ]
-
-  deps = [ "//kernel/liteos_m/kal/posix" ]
+}
+
+config("public") {
+  include_dirs = [ "." ]
+  include_dirs += [ "$LITEOSTHIRDPARTY/FatFs/source" ]
 }