adding Ads54J54 software device support

[ruck314]

Description

• ADC used in the Sundance FMC ADC 4x 500 MSPS 14 bit

Deps

This PR will depend on the following rogue software PRs/tags

• Allow array variables to be set from yaml by a dict of index/value pairs rogue#1055
• Release Candidate v6.6.0 rogue#1051

Example of YAML load

Ads54J54:
  Reg:
    0x00: 0xA400 # 4wire, 2s complement, Decimation filter enabled, Low pass
    0x0D: 0x0000
    0x0D: 0x0202
    0x0D: 0x0303
    0x01: 0xAF7A
    0x02: 0x0000
    0x03: 0x4040
    0x04: 0x000F
    0x05: 0x0000
    0x06: 0xF7FF # Power down: Light sleep channel AB
    0x07: 0x0144
    0x08: 0x0144
    0x0C: 0x31E4
    0x0E: 0x0050 # Only enable DC0 & DD0
    0x0F: 0x0101 # 2 octets per frame
    0x10: 0x03E1 # 2 lanes for channel AB
    0x13: 0x0010 # HD=0, enable Scramble mode
    0x16: 0x0101 # 2 octets per frame
    0x17: 0x03E1 # 2 lanes for channel AB
    0x1A: 0x0010 # HD=0, enable Scramble mode
    0x1D: 0x0000
    0x1E: 0x0000
    0x1F: 0xFE50 # Power down: Lane DA[1:0], Lane DB[1:0], Lane DC1, Lane DD1, JESD PLL channel AB
    0x20: 0x0000
    0x21: 0x2000
    ```