hssi: increate timeout to 1 second

Some operations are taking longer than the current timeout, such as
putting an HSSI port in loopback. Timeout is a failure, so waiting
a little long isn't a problem. Actual completion observed has been
over 100ms, so chose 1 second.

The current timeout logic could be improved but is not changed in
this commit. Time passed is calculated as the sum of sleep times,
which assumes MMIO reads are free and sleep is exactly the requested
wait.

Signed-off-by: Michael Adler <michael.adler@intel.com>

binaries/hssi/ethernet/hssicommon.py

@@ -53,8 +53,10 @@
 # mailbox register poll interval 1 microseconds
 HSSI_POLL_SLEEP_TIME = 1/1000000
 
-# mailbox register poll timeout 500 microseconds
-HSSI_POLL_TIMEOUT = 5/10000
+# Mailbox register poll timeout 1 second. Responses are typically much
+# faster than one second, but in rare cases can take a while. No reason
+# to make this short since timeout is generally a failure.
+HSSI_POLL_TIMEOUT = 1
 
 HSSI_FEATURE_ID = 0x15