xprtrdma: Update obsolete comment

Comment was made obsolete by commit 8cec3dba76 ("xprtrdma:
rpcrdma_regbuf alignment").

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever 2019-08-19 18:38:38 -04:00 • committed by Anna Schumaker
commit af08a7754a