firmware_loader: Fix possible resource leak in fw_log_firmware_info()

The alg instance should be released under the exception path, otherwise
there may be resource leak here.

To mitigate this, free the alg instance with crypto_free_shash when kmalloc
fails.

Fixes: 02fe26f2 ("firmware_loader: Add debug message with checksum for FW file")
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Reviewed-by: Russ Weight <russ.weight@linux.dev>
Link: https://lore.kernel.org/r/20241016110335.3677924-1-cuigaosheng1@huawei.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>