platform/x86: intel_scu_ipc: Increase virtual timeout from 3 to 5 seconds

Increasing the virtual timeout time to account for scenarios
that may require more time, like DisplayPort Multi-Stream Transport
(DP MST), where the disconnect time can be extended longer than
usual.

The recommended timeout range is 5-10 seconds, of which
we will take the lower bound.
Signed-off-by: Casey Bowman <casey.g.bowman@intel.com>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20210210192041.17022-1-casey.g.bowman@intel.comSigned-off-by: Hans de Goede <hdegoede@redhat.com>

drivers/platform/x86/intel_scu_ipc.c

@@ -75,7 +75,7 @@ struct intel_scu_ipc_dev {
 #define IPC_READ_BUFFER		0x90
 
 /* Timeout in jiffies */
-#define IPC_TIMEOUT		(3 * HZ)
+#define IPC_TIMEOUT		(5 * HZ)
 
 static struct intel_scu_ipc_dev *ipcdev; /* Only one for now */
 static DEFINE_MUTEX(ipclock); /* lock used to prevent multiple call to SCU */