staging: lustre: Use min3 macro

Replace comparsions between three expressions using
two min macros with min3 macro. Done using Coccinelle
Script:

@@
expression e1;
expression e2;
expression e3;
@@
(
- min(min(e1, e2), e3)
+ min3(e1, e2, e3)
|
- min(e1, min(e2, e3))
+ min3(e1, e2, e3)
)
Signed-off-by: Gargi Sharma <gs051095@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c

@@ -1093,8 +1093,8 @@ kiblnd_init_rdma(struct kib_conn *conn, struct kib_tx *tx, int type,
 			break;
 		}
 
-		wrknob = min(min(kiblnd_rd_frag_size(srcrd, srcidx),
-				 kiblnd_rd_frag_size(dstrd, dstidx)),
+		wrknob = min3(kiblnd_rd_frag_size(srcrd, srcidx),
+			      kiblnd_rd_frag_size(dstrd, dstidx),
 			      (__u32)resid);
 
 		sge = &tx->tx_sge[tx->tx_nwrq];