staging: unisys/virthba/virthba.c print u64 with %llu

drivers/staging/unisys/virthba/virthba.c:520:2: warning: format ‘%u’
expects argument of type ‘unsigned int’, but argument 4 has type ‘u64’
[-Wformat=]
drivers/staging/unisys/virthba/virthba.c:749:2: warning: format ‘%d’
expects argument of type ‘int’, but argument 5 has type ‘u64’
[-Wformat=]
drivers/staging/unisys/virthba/virthba.c:1142:4: warning: format ‘%d’
expects argument of type ‘int’, but argument 7 has type ‘u64’
[-Wformat=]
drivers/staging/unisys/virthba/virthba.c:1151:5: warning: format ‘%d’
expects argument of type ‘int’, but argument 5 has type ‘u64’
[-Wformat=]

After apply the patch:
linux-next]$ make C=1 drivers/staging/unisys/virthba/virthba.o
  CHK     include/config/kernel.release
  CHK     include/generated/uapi/linux/version.h
  CHK     include/generated/utsrelease.h
  CALL    scripts/checksyscalls.sh
  CHECK   drivers/staging/unisys/virthba/virthba.c
  CC [M]  drivers/staging/unisys/virthba/virthba.o

Signed-off-by: Honggang Li <enjoymindful@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>