efi_loader: DocBook comments for boot services

With 'make htmldocs' we can generate a documentation if the function
comments follow the DocBook conventions.

This patch adjusts the comments for EFI boot services and provides the
DocBook template for the EFI subsystem.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/MAINTAINERS b/MAINTAINERS
index f5ff57e..642c448 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -342,6 +342,7 @@
 M:	Alexander Graf <agraf@suse.de>
 S:	Maintained
 T:	git git://github.com/agraf/u-boot.git
+F:	doc/DocBook/efi.tmpl
 F:	doc/README.uefi
 F:	doc/README.iscsi
 F:	include/efi*