zephyr: add fatfs as a module

Added module.yml file to make this a zephyr module.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

CMakeLists.txt

@@ -1,3 +1,5 @@
+
+if(CONFIG_FAT_FILESYSTEM_ELM)
 add_library(ELMFAT INTERFACE)
 
 target_include_directories(ELMFAT INTERFACE include)
@@ -9,3 +11,4 @@ zephyr_library_sources(
     )
 zephyr_library_link_libraries(ELMFAT)
 target_link_libraries(ELMFAT INTERFACE zephyr_interface)
+endif()

zephyr/module.yml

@@ -0,0 +1,2 @@
+build:
+  cmake: .