hardwaremain: drop boot_complete parameter

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

BRANCH=none
BUG=none
TEST=boot tested on snow

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>
Reviewed-on: https://gerrit.chromium.org/gerrit/50720
Reviewed-by: Ronald G. Minnich <rminnich@chromium.org>

src/include/bootstate.h

@@ -165,7 +165,7 @@ void boot_state_current_block(void);
 void boot_state_current_unblock(void);
 
 /* Entry into the boot state machine. */
-void hardwaremain(int boot_complete);
+void hardwaremain(void);
 
 /* In order to schedule boot state callbacks at compile-time specify the
  * entries in an array using the BOOT_STATE_INIT_ENTRIES and