Merge branch 'net-faster-and-simpler-crc32c-computation'

Eric Biggers says:

====================
net: faster and simpler CRC32C computation

Update networking code that computes the CRC32C of packets to just call
crc32c() without unnecessary abstraction layers.  The result is faster
and simpler code.

Patches 1-7 add skb_crc32c() and remove the overly-abstracted and
inefficient __skb_checksum().

Patches 8-10 replace skb_copy_and_hash_datagram_iter() with
skb_copy_and_crc32c_datagram_iter(), eliminating the unnecessary use of
the crypto layer.  This unblocks the conversion of nvme-tcp to call
crc32c() directly instead of using the crypto layer, which patch 9 does.

v1: https://lore.kernel.org/20250511004110.145171-1-ebiggers@kernel.org
====================

Link: https://patch.msgid.link/20250519175012.36581-1-ebiggers@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>