replace SISUSBErrorLog() my simple macro
Tidy up the error messages and replacing log function by macro, that's giving us
a) more compact error message b) smaller, simpler code c) dropping one of the few remaining consumers of xf86VDrvMsgVerb(), so it soon can be phased out in xorg code base
(part of Xorg logging refactoring)
Signed-off-by: Enrico Weigelt, metux IT consult info@metux.net