hardwaremain: drop boot_complete parameter

it has been unused since 9 years or so, hence drop it.

Change-Id: I0706feb7b3f2ada8ecb92176a94f6a8df53eaaa1
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/3212
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Tested-by: build bot (Jenkins)

src/arch/x86/lib/c_start.S

@@ -49,12 +49,6 @@ _start:
 	pushl	$0
 	pushl	$0
 
-	/* push the boot_complete flag */
-	pushl	%ebp
-
-	/* Save the stack location */
-	movl	%esp, %ebp
-
 	/* Initialize the Interrupt Descriptor table */
 	leal	_idt, %edi
 	leal	vec0, %ebx
@@ -80,9 +74,6 @@ _start:
 	 */
 	post_code(POST_PRE_HARDWAREMAIN)	/* post fe */
 
-	/* Restore the stack location */
-	movl	%ebp, %esp
-
 #if CONFIG_GDB_WAIT
 	call gdb_stub_breakpoint
 #endif