Commit 597c56e3 ("xhci: update bounce buffer with correct sg num")
caused the following build warnings:

drivers/usb/host/xhci-ring.c:676:19: warning: format '%ld' expects argument of type 'long int', but argument 3 has type 'size_t {aka unsigned int}' [-Wformat=]

Use %zu for printing size_t type in order to fix the warnings.

Fixes: 597c56e3 ("xhci: update bounce buffer with correct sg num")
Reported-by: Nkbuild test robot <lkp@intel.com>
Signed-off-by: NFabio Estevam <festevam@gmail.com>
Cc: stable <stable@vger.kernel.org>
Acked-by: NMathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>