efi_loader: make efi_add_memory_map_pg() static

The function is only used in the efi_memory.c module.

Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/lib/efi_loader/efi_memory.c b/lib/efi_loader/efi_memory.c
index 11d092d..6d00b18 100644
--- a/lib/efi_loader/efi_memory.c
+++ b/lib/efi_loader/efi_memory.c
@@ -268,6 +268,7 @@
  *				memory
  * Return:			status code
  */
+static
 efi_status_t efi_add_memory_map_pg(u64 start, u64 pages,
 				   int memory_type,
 				   bool overlap_conventional)