staging: exfat: fix spelling mistake

CHECK: 'propogate' may be misspelled - perhaps 'propagate'?
FILE: drivers/staging/exfat/exfat_super.c:1484

CHECK: 'propogate' may be misspelled - perhaps 'propagate'?
FILE: drivers/staging/exfat/exfat_super.c:1551

Signed-off-by: Susarla Nikhilesh <nikhilesh1294@gmail.com>
Link: https://lore.kernel.org/r/20191203143023.2786-1-nikhilesh1294@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>