efi_loader: pre-seed UEFI variables

Include a file with the initial values for non-volatile UEFI variables
into the U-Boot binary. If this variable is set, changes to variable PK
will not be allowed.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/include/asm-generic/sections.h b/include/asm-generic/sections.h
index 17a31ec..0577238 100644
--- a/include/asm-generic/sections.h
+++ b/include/asm-generic/sections.h
@@ -25,6 +25,8 @@
 extern char __start_rodata[], __end_rodata[];
 extern char __efi_helloworld_begin[];
 extern char __efi_helloworld_end[];
+extern char __efi_var_file_begin[];
+extern char __efi_var_file_end[];
 
 /* Start and end of .ctors section - used for constructor calls. */
 extern char __ctors_start[], __ctors_end[];