fsverity: Remove inode parameter from fsverity_hash_block()

Due to the conversion from crypto_shash to the library API,
fsverity_hash_block() can no longer fail.  Therefore, the inode
parameter, which was used only to print an error message in the case of
a failure, is no longer necessary.  Remove it.

Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20250915160819.140019-6-ebiggers@kernel.org


Signed-off-by: Eric Biggers <ebiggers@kernel.org>