FPGA: Fixup for SPI bus master.

Need to be merged with "FPGA: AUX connector. SPI bus to ADF4350 was
added."(5baf79cf7c7) commit.
FPGA: VitaTimer fixup.

Need to be merged with "FPGA: Minor timing fix: add pipeline register to rising and falling edge of PPS signal" (cb657548892) commit.
FPGA: Makefile was fixed due to rebase to release_003_005_003.
FPGA: TX DSP part was fixed due to rebase to release_003_005_003.

Need to be merged with "FPGA: The second transmit channel was added."
commit (5dd996d154).