nfsd: stop translating EAGAIN to nfserr_dropit

We no longer need this.

Also, EWOULDBLOCK is generally a synonym for EAGAIN, but that may not be
true on all architectures, so map it as well.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

fs/nfsd/nfsproc.c

@@ -735,7 +735,8 @@ nfserrno (int errno)
 		{ nfserr_stale, -ESTALE },
 		{ nfserr_jukebox, -ETIMEDOUT },
 		{ nfserr_jukebox, -ERESTARTSYS },
-		{ nfserr_dropit, -EAGAIN },
+		{ nfserr_jukebox, -EAGAIN },
+		{ nfserr_jukebox, -EWOULDBLOCK },
 		{ nfserr_jukebox, -ENOMEM },
 		{ nfserr_badname, -ESRCH },
 		{ nfserr_io, -ETXTBSY },