flashchips: Mark XM25QH64C as probe & read tested

As reported by Robert on the flashprog mailing list.

Change-Id: I1503e1120121d45f688dfbc9f9c33c8c63c50d77
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.sourcearcade.org/c/flashprog/+/579
diff --git a/flashchips.c b/flashchips.c
index 4b55ea9..e961bdc 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -25900,7 +25900,7 @@
 		.page_size	= 256,
 		.feature_bits	= FEATURE_WRSR_WREN | FEATURE_WRSR2 | FEATURE_OTP | FEATURE_QPI_SRP,
 		.dummy_cycles	= { .qpi_read_params = { 2, 4, 6, 8 } },
-		.tested		= TEST_UNTESTED,
+		.tested		= TEST_OK_PR,
 		.probe_timing	= TIMING_ZERO,
 		.block_erasers	=
 		{