wifi: ath11k: print a warning when crypto_alloc_shash() fails

Christoph reported that ath11k failed to initialise when michael_mic.ko
module was not installed. To make it easier to notice that case print a
warning when crypto_alloc_shash() fails.

Compile tested only.
Reported-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/all/20221130133016.GC3055@lst.de/Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20230405090425.1351-1-kvalo@kernel.org

drivers/net/wireless/ath/ath11k/dp_rx.c

@@ -3106,8 +3106,11 @@ int ath11k_peer_rx_frag_setup(struct ath11k *ar, const u8 *peer_mac, int vdev_id
 	int i;
 
 	tfm = crypto_alloc_shash("michael_mic", 0, 0);
-	if (IS_ERR(tfm))
+	if (IS_ERR(tfm)) {
+		ath11k_warn(ab, "failed to allocate michael_mic shash: %ld\n",
+			    PTR_ERR(tfm));
 		return PTR_ERR(tfm);
+	}
 
 	spin_lock_bh(&ab->base_lock);