x86: Show the un-relocated IP address in exceptions

When trying to figure out where an exception has occured, the relocated
address is not a lot of help. Its value depends on various factors. Show
the un-relocated IP as well. This can be looked up in System.map directly.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

arch/x86/cpu/interrupts.c

@@ -103,6 +103,8 @@ static void dump_regs(struct irq_regs *regs)
 
 	printf("EIP: %04x:[<%08lx>] EFLAGS: %08lx\n",
 			(u16)cs, eip, eflags);
+	if (gd->flags & GD_FLG_RELOC)
+		printf("Original EIP :[<%08lx>]\n", eip - gd->reloc_off);
 
 	printf("EAX: %08lx EBX: %08lx ECX: %08lx EDX: %08lx\n",
 		regs->eax, regs->ebx, regs->ecx, regs->edx);