Revert "usb: host: fotg210: Use dma_pool_zalloc"

Revert "usb: host: fotg210: Use dma_pool_zalloc"

This reverts commit acdde5c4ab747349149f093c77385d323d63290c for the
same reason as commit d4390ca8c0f4ba3528f72010def725220b2bfc8d in the
ehci-hcd driver.

Alan writes:
    What you can't see just from reading the patch is that in both
    cases (ehci->itd_pool and ehci->sitd_pool) there are two
    allocation paths -- the two branches of an "if" statement -- and
    only one of the paths calls dma_pool_[z]alloc.  However, the
    memset is needed for both paths, and so it can't be eliminated.
    Given that it must be present, there's no advantage to calling
    dma_pool_zalloc rather than dma_pool_alloc.

Signed-off-by: Kelly Devilliv <kelly.devilliv@gmail.com>
Link: https://lore.kernel.org/r/20210627125747.127646-2-kelly.devilliv@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>