Impact: cleanup

Move/remove leftover RDC321 files. Now that it's not a subarch anymore,
arch/x86/mach-rdc321x and arch/x86/include/asm/mach-rdc321x/ are not
needed.

One include file was still in use: rdc321x_defs.h, move that to the
generic x86 asm header directory.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Fix some drivers so that they use the unlocked_ioctl call.
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

This patch adds support for the built-in RDC R-321x SoC watchdog.
Signed-off-by: NFlorian Fainelli <florian.fainelli@telecomint.eu>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>