ext4: fix wrong unit use in ext4_mb_new_blocks

commit 2ec6d0a5 upstream.

Function ext4_free_blocks_simple needs count in cluster. Function
ext4_free_blocks accepts count in block. Convert count to cluster
to fix the mismatch.

Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: stable@kernel.org
Reviewed-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Link: https://lore.kernel.org/r/20230603150327.3596033-12-shikemeng@huaweicloud.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>