staging: unisys: fix format string %Lx to %llx for u64

this patch fixes the following sonarqube issue.
%Lx in format string (no. 1) requires 'unsigned long long'
but the argument type is 'unsigned long long'

Signed-off-by: Erik Arfvidson <erik.arfvidson@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>