mainboard: Trivial - drop trailing blank lines at EOF

Change-Id: I05d6d22664155ac8478e665733f816776e277c22
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/6200
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

src/mainboard/aopen/dxplplusu/acpi_tables.c

@@ -160,4 +160,3 @@ unsigned long write_acpi_tables(unsigned long start)
 	printk(BIOS_INFO, "ACPI: done.\n");
 	return current;
 }
-