platform/x86: intel_scu_ipc: Update timeout value in comment

platform/x86: intel_scu_ipc: Update timeout value in comment

The comment decribing the IPC timeout hadn't been updated when the
actual timeout was changed from 3 to 5 seconds in
commit ddb6e0a0f0ee ("platform/x86: intel_scu_ipc: Increase virtual
timeout from 3 to 5 seconds") .

Since the value is anyway updated to 10s now, take this opportunity to
update the value in the comment too.

Signed-off-by: Prashant Malani <pmalani@chromium.org>
Cc: Benson Leung <bleung@chromium.org>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Link: https://lore.kernel.org/r/20210928101932.2543937-4-pmalani@chromium.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>