make: mufs: re-organise code and add separate Makefile

Makefile

@@ -29,13 +29,6 @@ obj-y += source/main.o
 
 obj-y += source/core/flash.o
 
-obj-y += source/fs/mufs/block.o
-obj-y += source/fs/mufs/dir.o
-obj-y += source/fs/mufs/file.o
-obj-y += source/fs/mufs/path.o
-obj-y += source/fs/mufs/super.o
-obj-y += source/fs/mufs/tree.o
-
 obj = $(addprefix $(BUILD)/, $(obj-y))
 
 # Include the dependencies.

source/Makefile

@@ -1,3 +1,4 @@
 -include source/ftl/Makefile
+-include source/mufs/Makefile
 -include source/platform/Makefile
 -include source/shell/Makefile

source/mufs/Makefile

@@ -0,0 +1,6 @@
+obj-y += source/mufs/block.o
+obj-y += source/mufs/dir.o
+obj-y += source/mufs/file.o
+obj-y += source/mufs/path.o
+obj-y += source/mufs/super.o
+obj-y += source/mufs/tree.o