Input: jornada720_kbd - remove unneeded mach/hardware.h include

The Jornada720 keyboard driver does not make use of anything from the
mach/hardware.h header, so this header can be removed.

Tested-by: Adam Wysocki <armlinux@chmurka.net>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>