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/common/log.c b/common/log.c
index 1b1b98e..680a60f 100644
--- a/common/log.c
+++ b/common/log.c
@@ -21,6 +21,7 @@
 	"core",
 	"driver-model",
 	"device-tree",
+	"efi",
 };
 
 static const char *log_level_name[LOGL_COUNT] = {
diff --git a/doc/README.log b/doc/README.log
index 2abaee0..dc9e2de 100644
--- a/doc/README.log
+++ b/doc/README.log
@@ -51,6 +51,7 @@
    LOGC_BOARD	- Related to board-specific code
    LOGC_CORE	- Related to core driver-model support
    LOGC_DT	- Related to device tree control
+   LOGC_EFI	- Related to EFI implementation
 
 
 Enabling logging
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,