Add some more CRC that may be useful fo TBuf.

libraries/external/easics/src/vhdl/PCK_CRC16_D28.vhd

libraries/external/easics/src/vhdl/PCK_CRC16_D28_usb.vhd

libraries/external/easics/src/vhdl/PCK_CRC16_D32_usb.vhd

libraries/external/easics/src/vhdl/PCK_CRC16_D32_x25.vhd

libraries/external/easics/src/vhdl/PCK_CRC28_D28.vhd

libraries/external/easics/src/vhdl/PCK_CRC32_D32_eth.vhd

libraries/external/easics/src/vhdl/PCK_CRC32_D64_eth.vhd