From: Christoph Hellwig <hch@lst.de>
Date: Mon, 20 Jul 2020 13:36:09 +0200

Most of the tree only uses and implements csum_partial_copy_nocheck,
but the c6x and lib/checksum.c implement a csum_partial_copy that
isn't used anywere except to define csum_partial_copy.  Get rid of
this pointless alias.

Signed-off-by: Christoph Hellwig <hch@lst.de>

I'll apply this to net-next, thanks.