efi_loader: typo mstching

%s/mstching/matching/

Reported-by: E Shattow <lucent@gmail.com>
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/lib/efi_loader/efi_var_common.c b/lib/efi_loader/efi_var_common.c
index aa8feff..ed53bcf 100644
--- a/lib/efi_loader/efi_var_common.c
+++ b/lib/efi_loader/efi_var_common.c
@@ -419,7 +419,7 @@
 }
 
 /**
- * efi_var_collect() - Copy EFI variables mstching attributes mask
+ * efi_var_collect() - Copy EFI variables matching attributes mask
  *
  * @bufp:	buffer containing variable collection
  * @lenp:	buffer length