Define post codes for OS boot and resume

And move the pre-hardwaremain post code to 0x79
so it comes before hardwaremain at 0x80.

Emit these codes from ACPI OS resume vector as well
as the finalize step in bd82x6x southbridge.

Change-Id: I7f258998a2f6549016e99b67bc21f7c59d2bcf9e
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/1702
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/arch/x86/boot/acpi.c

@@ -630,6 +630,7 @@ void suspend_resume(void)
 		/* Call mainboard resume handler first, if defined. */
 		if (mainboard_suspend_resume)
 			mainboard_suspend_resume();
+		post_code(POST_OS_RESUME);
 		acpi_jump_to_wakeup(wake_vec);
 	}
 }