[ACCTON][AS5915-16X] Add new platform

[WillyLiu-EC]

CPU: Intel Atom Processor C3308, 1.6GHz

sub-system: DDR SDRAM: 8GB x 1 2400MHz with ECC (SO-DIMM) DDR4 SPI Flash (Boot): 16MB x 2 M.2 SSD: 32GB MLC TPM: SLB9670XQ2.0FW7.63 INFINEON

Management : UART RS232 console port (RJ45), Out-band Management Ethernet port (RJ45)

Timing: GNSS GPS Receiver (SMB reserved), 1PPS IN and 1PPS OUT(SMB), 10MHz IN and 10MHz OUT (SMB), ToD PPS (RJ45)

MAC: Broadcom BCM88273, 32Gbps full duplex switching

Ethernet Ports: 4x 10GE SFP+, 8x 1GE SFP and 4x 1GE RJ45

CPLD: Altera 5M2210ZF324I5N (FBGA324)

FPGA: Altera EP4CGX50CF23I7N (FBGA484)

PCB: 18 Layers, TU-863+ for Motherboard 8 Layers, CPU board

PSU: Max 180W output, DC to DC, 1+1 redundant load-sharing