Add man page references to provided buffers

For anything that supports provided buffers, ensure we have useful
links in the SEE ALSO section.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

man/io_uring_prep_recv.3

diff --git a/man/io_uring_prep_recv.3 b/man/io_uring_prep_recv.3
index 1869a02..b2876a9 100644
--- a/man/io_uring_prep_recv.3
+++ b/man/io_uring_prep_recv.3
@@ -102,4 +102,6 @@
 .SH SEE ALSO
 .BR io_uring_get_sqe (3),
 .BR io_uring_submit (3),
+.BR io_uring_buf_ring_init (3),
+.BR io_uring_buf_ring_add (3),
 .BR recv (2)

man/io_uring_prep_recvmsg.3

diff --git a/man/io_uring_prep_recvmsg.3 b/man/io_uring_prep_recvmsg.3
index f74b6b5..a54e3fd 100644
--- a/man/io_uring_prep_recvmsg.3
+++ b/man/io_uring_prep_recvmsg.3
@@ -121,4 +121,6 @@
 .SH SEE ALSO
 .BR io_uring_get_sqe (3),
 .BR io_uring_submit (3),
+.BR io_uring_buf_ring_init (3),
+.BR io_uring_buf_ring_add (3),
 .BR recvmsg (2)

man/io_uring_prep_send.3

diff --git a/man/io_uring_prep_send.3 b/man/io_uring_prep_send.3
index cc65b84..895eb39 100644
--- a/man/io_uring_prep_send.3
+++ b/man/io_uring_prep_send.3
@@ -144,5 +144,7 @@
 .SH SEE ALSO
 .BR io_uring_get_sqe (3),
 .BR io_uring_submit (3),
+.BR io_uring_buf_ring_init (3),
+.BR io_uring_buf_ring_add (3),
 .BR send (2)
 .BR sendto (2)

man/io_uring_prep_sendmsg.3

diff --git a/man/io_uring_prep_sendmsg.3 b/man/io_uring_prep_sendmsg.3
index 4cdb0c6..a38f882 100644
--- a/man/io_uring_prep_sendmsg.3
+++ b/man/io_uring_prep_sendmsg.3
@@ -137,4 +137,6 @@
 .SH SEE ALSO
 .BR io_uring_get_sqe (3),
 .BR io_uring_submit (3),
+.BR io_uring_buf_ring_init (3),
+.BR io_uring_buf_ring_add (3),
 .BR sendmsg (2)