erofs: use Z_EROFS_LCLUSTER_TYPE_MAX to simplify switches

[ Upstream commit 3b7781ae ]

There's no need to enumerate each type.  No logic changes.

Signed-off-by: Hongzhen Luo <hongzhen@linux.alibaba.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Link: https://lore.kernel.org/r/20250210032923.3382136-1-hongzhen@linux.alibaba.com


Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Stable-dep-of: b44686c8 ("erofs: fix large fragment handling")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>