net: caif: remove redundant re-assignment of pointer pfrm

The pointer pfrm is initialized and then later re-assigned the same
value and hence the second assignment is redundant and can be removed.

Cleans up clang warning:
drivers/net/caif/caif_hsi.c:222:6: warning: Value stored to 'pfrm'
during its initialization is never read
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/caif/caif_hsi.c

@@ -264,7 +264,6 @@ static int cfhsi_tx_frm(struct cfhsi_desc *desc, struct cfhsi *cfhsi)
 	}
 
 	/* Create payload CAIF frames. */
-	pfrm = desc->emb_frm + CFHSI_MAX_EMB_FRM_SZ;
 	while (nfrms < CFHSI_MAX_PKTS) {
 		struct caif_payload_info *info;
 		int hpad;