linux-phytec-ti

m68knommu: Rename m548x_wdt.c to m54xx_wdt.c

All m548x files were renamed to m54xx, except m548x_wdt.c.  Fix that.

Signed-off-by: Philippe De Muyter <phdm@macqel.be>
Signed-off-by: Greg Ungerer <gerg@uclinux.org>