Identifying the SPI master
It's difficult to use a GPIO pin on a slave device as a chip select. If the chip select signal is not detected soon enough at the slave device after it is asserted you can miss the data that the master is clocking out. Since the CY7C63803 has its SSEL pin connected to the chip select line my guess is that it is the slave. The CC1110 is probably the master. You will probably need to lift a pin on one of the devices to know for sure.