octeontx2-pf: Fix devm_kcalloc() error checking

The devm_kcalloc() function never return error pointers, it returns NULL
on failure.  Also delete the netdev_err() printk.  These allocation
functions already have debug output built-in some the extra error message
is not required.

Fixes: efabce2 ("octeontx2-pf: AF_XDP zero copy receive support")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://patch.msgid.link/aQYKkrGA12REb2sj@stanley.mountain
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: Dan Carpenter

drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c

@@ -1516,10 +1516,8 @@ int otx2_pool_init(struct otx2_nic *pfvf, u16 pool_id,
 		pool->xdp_cnt = numptrs;
 		pool->xdp = devm_kcalloc(pfvf->dev,
 					 numptrs, sizeof(struct xdp_buff *), GFP_KERNEL);
-		if (IS_ERR(pool->xdp)) {
-			netdev_err(pfvf->netdev, "Creation of xsk pool failed\n");
-			return PTR_ERR(pool->xdp);
-		}
+		if (!pool->xdp)
+			return -ENOMEM;
 	}
 
 	return 0;