check_f2fs: fix wrong calculation of # of sectors

Bug: 279519292
Merged-In: Ief3718f35f8ad10bc3b2efc2e1d3445016ee20da
Change-Id: Ief3718f35f8ad10bc3b2efc2e1d3445016ee20da
Signed-off-by: Jaegeuk Kim <[email protected]>
1 file changed