x86, realmode: don't copy real_mode_header

Replaced copying of real_mode_header with a pointer
to beginning of RM memory.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com>
Link: http://lkml.kernel.org/r/1336501366-28617-19-git-send-email-jarkko.sakkinen@intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
diff --git a/arch/x86/realmode/rmpiggy.S b/arch/x86/realmode/rmpiggy.S
index fd72a99..204c6ec 100644
--- a/arch/x86/realmode/rmpiggy.S
+++ b/arch/x86/realmode/rmpiggy.S
@@ -13,6 +13,8 @@
 	.incbin	"arch/x86/realmode/rm/realmode.bin"
 END(real_mode_blob)
 
+GLOBAL(real_mode_blob_end);
+
 GLOBAL(real_mode_relocs)
 	.incbin	"arch/x86/realmode/rm/realmode.relocs"
 END(real_mode_relocs)