efi_loader: provide new doc/README.uefi

Provides information about

- usage of the bootefi command
- overview of UEFI
- interaction between U-Boot and EFI drivers

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
Acked-by: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/MAINTAINERS b/MAINTAINERS
index fde77b2..bf2a84c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -330,7 +330,7 @@
 M:	Alexander Graf <agraf@suse.de>
 S:	Maintained
 T:	git git://github.com/agraf/u-boot.git
-F:	doc/README.efi
+F:	doc/README.uefi
 F:	doc/README.iscsi
 F:	include/efi*
 F:	include/pe.h