log: add category LOGC_EFI

The EFI implementation does not fit into any of the existing categories.

Provide LOGC_EFI so that EFI related message can be filtered.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/include/log.h b/include/log.h
index 68368d5..20dc528 100644
--- a/include/log.h
+++ b/include/log.h
@@ -46,6 +46,7 @@
 	LOGC_CORE,
 	LOGC_DM,	/* Core driver-model */
 	LOGC_DT,	/* Device-tree */
+	LOGL_EFI,	/* EFI implementation */
 
 	LOGC_COUNT,
 	LOGC_END,