mtd: parsers: scpart: fix __udivdi3 undefined on mips

This fixes the following compile error on mips architecture with clang
version 16.0.0 reported by the 0-DAY CI Kernel Test Service:
ld.lld: error: undefined symbol: __udivdi3
referenced by scpart.c
mtd/parsers/scpart.o:(scpart_parse) in archive drivers/built-in.a

As a workaround this makes 'offs' a 32-bit type. This is enough, because
the mtd containing partition table practically does not exceed 1 MB. We
can revert this when the [Link] has been resolved.

Link: https://github.com/ClangBuiltLinux/linux/issues/1635
Fixes: 9b78ef0c7997 ("mtd: parsers: add support for Sercomm partitions")
Reported-by: kernel test robot <lkp@intel.com>
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mikhail Zhilkin <csharper2005@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/805fe58e-690f-6a3f-5ebf-2f6f6e6e4599@gmail.com

mtd: parsers: scpart: add missing of_node_put() in scpart_parse()

of_get_child_by_name() will increase the refcount of 'ofpart_node',
so add of_node_put() after using it to avoid refcount leak.

Fixes: 9b78ef0c7997 ("mtd: parsers: add support for Sercomm partitions")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220617014008.851583-1-yangyingliang@huawei.com

mtd: parsers: add support for Sercomm partitions

This adds an MTD partition parser for the Sercomm partition table that
is used in some Beeline, Netgear and Sercomm routers.

The Sercomm partition map table contains real partition offsets, which
may differ from device to device depending on the number and location of
bad blocks on NAND.

Original patch (proposed by NOGUCHI Hiroshi):
Link: https://github.com/openwrt/openwrt/pull/1318#issuecomment-420607394

Signed-off-by: NOGUCHI Hiroshi <drvlabo@gmail.com>
Signed-off-by: Mikhail Zhilkin <csharper2005@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220529110714.189732-1-csharper2005@gmail.com