Change hfa overheat limit to 90 degrees.
diff --git a/driver-hashfast.h b/driver-hashfast.h
index ea1fbb0..ea09100 100644
--- a/driver-hashfast.h
+++ b/driver-hashfast.h
@@ -24,7 +24,7 @@ bool opt_hfa_dfu_boot;
#define HASHFAST_MINER_THREADS 1
#define HFA_CLOCK_DEFAULT 550
-#define HFA_OVERHEAT_DEFAULT 85
+#define HFA_OVERHEAT_DEFAULT 90
// Matching fields for hf_statistics, but large #s for local accumulation, per-die
struct hf_long_statistics {