MAINTAINERS: erofs: add myself as reviewer

Glad to contribute the fscache mode to erofs. Sincerely I recommend
myself as the reviewer to maintain these codes.
Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com>
Acked-by: Chao Yu <chao@kernel.org>
Acked-by: Gao Xiang <xiang@kernel.org>
Link: https://lore.kernel.org/r/20220606021103.89211-1-jefflexu@linux.alibaba.comSigned-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>

MAINTAINERS

@@ -7414,6 +7414,7 @@ EROFS FILE SYSTEM
 M:	Gao Xiang <xiang@kernel.org>
 M:	Chao Yu <chao@kernel.org>
 R:	Yue Hu <huyue2@coolpad.com>
+R:	Jeffle Xu <jefflexu@linux.alibaba.com>
 L:	linux-erofs@lists.ozlabs.org
 S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git