FROMGIT: vsock/virtio: Rename virtio_vsock_skb_rx_put()

In preparation for using virtio_vsock_skb_rx_put() when populating SKBs
on the vsock TX path, rename virtio_vsock_skb_rx_put() to
virtio_vsock_skb_put().

No functional change.

Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Will Deacon <will@kernel.org>
Message-Id: <20250717090116.11987-9-will@kernel.org>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 8a5c2992b0bda3ef65fdd3835210c2301603c53e
 git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git

 vhost)
Bug: 421244320
Bug: 436528862
Signed-off-by: Will Deacon <willdeacon@google.com>
Change-Id: I4455bdbd484e54fdcf75f9169c71c835bfac1e16