To clarify that it is a 16-bit checksum, the parts related to the 16-bit
checksum are renamed and change type to u16.
Furthermore, replace checksum calculation in exfat_load_upcase_table()
with exfat_calc_checksum32().
Signed-off-by: NTetsuhiro Kohada <kohada.t2@gmail.com>
Reviewed-by: NSungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: NNamjae Jeon <namjae.jeon@samsung.com>