make banner consistent with documentation

switch-pci-driver

@@ -8,7 +8,7 @@ driver_map = {}
 verbose = false
 
 OptionParser.new do |opts|
-  opts.banner = 'Usage: switch-pci-driver ((--device <device-id> | --iommu-group <group-number>)* --to <driver>)*'
+  opts.banner = 'Usage: switch-pci-driver ((--device=<device-id> | --iommu-group=<group-number>)+ --to=<driver>)+'
 
   opts.on('-dDEVICE', '--device DEVICE', 'Device to be (re)bound.') do |v|
     device_regex = %r{^(?<domain>[0-9a-f]{4}):(?<bus>[0-9a-f]{2}):(?<slot>[0-9a-f]{2}).(?<function>[0-9a-f])$}