oem-meta: Add file IO responder for APML alert

Add APML alert file IO type.

Tested: Verified in yosemite4 platform.

Change-Id: I66c40bdd0c1ce506711996268f15c23217afbd3c
Signed-off-by: Peter Ho <Peter_MH_Ho@wiwynn.com>
Signed-off-by: Sora Su <baxiche@gmail.com>
diff --git a/oem/meta/libpldmresponder/file_io_by_type.hpp b/oem/meta/libpldmresponder/file_io_by_type.hpp
index 7fee086..86cb708 100644
--- a/oem/meta/libpldmresponder/file_io_by_type.hpp
+++ b/oem/meta/libpldmresponder/file_io_by_type.hpp
@@ -15,7 +15,8 @@
     POST_CODE = 0x00,
     BIOS_VERSION = 0x01,
     POWER_CONTROL = 0x02,
-    HTTP_BOOT = 0x03
+    HTTP_BOOT = 0x03,
+    APML_ALERT = 0x04
 };
 
 /**