The text sections in *.romstage.o are called .text instead of .rom.text.
The _erom can not be calculated correctly without this patch. Nobody uses
_erom currently, so nobody seems cares it.

Signed-off-by: Zheng Bao <zheng.bao@amd.com>

Index: src/arch/x86/init/ldscript_fallback_cbfs.lb
===================================================================
--- src/arch/x86/init/ldscript_fallback_cbfs.lb	(revision 6374)
+++ src/arch/x86/init/ldscript_fallback_cbfs.lb	(working copy)
@@ -35,6 +35,7 @@
 	.rom . : {
 		_rom = .;
 		*(.rom.text);
+		*(.text);
 		*(.rom.data);
 		*(.rodata);
 		*(.rodata.*);