fpga: stratix10-soc: extend driver for bitstream authentication

commit 896af4712fa92dc81b0e6182725105318868ebef from
https://github.com/altera-opensource/linux-socfpga.git

Extend FPGA manager driver to support FPGA bitstream authentication on
Intel SocFPGA platforms.

Add COMMAND_AUTHENTICATE_BITSTREAM command flag for new added bitstream
authentication feature. Authenticating a bitstream is to make sure a signed
bitstream has the valid signatures.

Except for the actual configuration of the device, the bitstream
authentication works the same way as FPGA configuration does. If the
authentication passes, the signed bitstream will be programmed into QSPI
flash memory and will be expected to boot without issues.

Signed-off-by: Richard Gong <richard.gong@intel.com>
Signed-off-by: Liwei Song <liwei.song@windriver.com>