NOR: last_addr also needs correction when checking alignment

Otherwise the new alignment checking algorithm thinks that the
address is not aligned, because it is way beyond the last sector.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>

src/flash/nor/core.c

@@ -316,6 +316,7 @@ static int flash_iterate_address_range(struct target *target,
 	/** @todo: handle erasures that cross into adjacent banks */
 
 	addr -= c->base;
+	last_addr -= c->base;
 
 	for (i = 0; i < c->num_sectors; i++)
 	{