spitz.conf: add ZAURUS_C3200 setting for mtd partition fixup

Signed-off-by: Andrea Adami <andrea.adami@gmail.com>
linux-yocto: spitz: add conditional mtd patching for SL-C3200

New setting in spitz.conf: ZAURUS_C3200 = "1" is the trigger

Signed-off-by: Andrea Adami <andrea.adami@gmail.com>