mtd: mtdswap: fix printk format warning

The number is actually a sizeof(), so using %zu for it builds
cleanly on 32-bit or 64-bit.

drivers/mtd/mtdswap.c:1456: warning: format '%lu' expects type 'long unsigned int', but argument 4 has type 'unsigned int'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
1 file changed