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