Adjust antminer U1 timing according to command line frequency set, fixing the need for icarus timing on the command line.
diff --git a/driver-icarus.c b/driver-icarus.c
index 04c25c3..49a61a7 100644
--- a/driver-icarus.c
+++ b/driver-icarus.c
@@ -106,7 +106,8 @@ ASSERT1(sizeof(uint32_t) == 4);
// Per FPGA
#define CAIRNSMORE2_HASH_TIME 0.0000000066600
#define NANOSEC 1000000000.0
-#define ANTMINERUSB_HASH_TIME 0.0000000006450
+#define ANTMINERUSB_HASH_MHZ 0.000000125
+#define ANTMINERUSB_HASH_TIME (ANTMINERUSB_HASH_MHZ / (double)(opt_anu_freq))
#define CAIRNSMORE2_INTS 4
// Icarus Rev3 doesn't send a completion message when it finishes