Mark ST M25P80 as completely supported

Thanks to Harald Gutmann for testing.

Corresponding to flashrom svn r620.
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>

flashchips.c

@@ -2321,7 +2321,7 @@ struct flashchip flashchips[] = {
 		.model_id	= ST_M25P80,
 		.total_size	= 1024,
 		.page_size	= 256,
-		.tested		= TEST_UNTESTED,
+		.tested		= TEST_OK_PREW,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
 		.erase		= spi_chip_erase_c7,