efi_loader: split README.efi into two separate documents

README.efi describes two different concepts:
* U-Boot exposing the UEFI API
* U-Boot running on top of UEFI.

This patch splits the document in two.
Religious references are removed.

The separation of the concepts makes sense before detailing the internals
of U-Boot exposing the UEFI API in a future patch.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/MAINTAINERS b/MAINTAINERS
index ac21ec5..d2f8c51 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -289,6 +289,7 @@
 M:	Alexander Graf <agraf@suse.de>
 S:	Maintained
 T:	git git://github.com/agraf/u-boot.git
+F:	doc/README.efi
 F:	doc/README.iscsi
 F:	include/efi*
 F:	include/pe.h