Merge branch 'L2SDP-187' into 'master'

applications/ta2/bsp/board_env.xml

applications/ta2/bsp/bringup/README.txt

applications/ta2/bsp/bringup/a10_ref_initialization.tgz

applications/ta2/bsp/hardware/ta2_unb2b_bsp/board.qsys

applications/ta2/bsp/hardware/ta2_unb2b_bsp/board_spec.xml

applications/ta2/bsp/hardware/ta2_unb2b_bsp/ddr4.qsys

applications/ta2/bsp/hardware/ta2_unb2b_bsp/device.tcl

applications/ta2/bsp/hardware/ta2_unb2b_bsp/flat.qsf

applications/ta2/bsp/hardware/ta2_unb2b_bsp/hdllib.cfg

applications/ta2/bsp/hardware/ta2_unb2b_bsp/hw_iface.iipx

applications/ta2/bsp/hardware/ta2_unb2b_bsp/iface.ipx

...a2/bsp/hardware/ta2_unb2b_bsp/ip/board/board_avs_eth_0.ip

...ns/ta2/bsp/hardware/ta2_unb2b_bsp/ip/board/board_clk_0.ip

...ns/ta2/bsp/hardware/ta2_unb2b_bsp/ip/board/board_cpu_0.ip

.../bsp/hardware/ta2_unb2b_bsp/ip/board/board_jtag_uart_0.ip

.../bsp/hardware/ta2_unb2b_bsp/ip/board/board_kclk_global.ip

...2/bsp/hardware/ta2_unb2b_bsp/ip/board/board_kernel_clk.ip

...p/hardware/ta2_unb2b_bsp/ip/board/board_kernel_clk_gen.ip

...dware/ta2_unb2b_bsp/ip/board/board_kernel_ddr4a_bridge.ip

...hardware/ta2_unb2b_bsp/ip/board/board_kernel_interface.ip