[GBA] Sennen Kazoku (Japan) cannot save (Rev 0, 1, VC) or reach ingame (Rev 0) due to missing RTC support

[ExperimentT020]

Describe the issue
All 3 versions of Sennen Kazoku cannot currently save due to missing RTC support and reach different levels of ingame depending on the revision of the game.
Rev 0: Cannot past boot due to a RTC check on boot.
Rev 1: Reaches ingame, but cannot save due to missing RTC.
Rev 1 (Virtual Console): Same as Rev 1.

Attempting to save on Rev1/VC or booting on Rev 0 produces the same screen that roughly translates as:
"The clock function appears to be broken. Please contact your nearest Nintendo Customer Service Center".

Rom Information

----------------------------------------------------------------------------------------------------
name:   Sennen Kazoku (Japan)
  title:  Sennen Kazoku (Japan)
  sha256: 0000c46dc2c00c45f28557553ad59ea6d4f301e82e7336e7d0363d50dc051ca0
  board
    memory
      type: ROM
      size: 0x1000000
      content: Program
      mirror: false
    memory
      type: Flash
      size: 0x20000
      content: Save
      manufacturer: Macronix
-----------------------------------------------------------------------------------------------------

  title:  Sennen Kazoku (Japan) (Rev 1)
  sha256: 219f91b477b908cc391aa9cc05acd17c41f5d220588dd6debf40ba5da1af41de
  board
    memory
      type: ROM
      size: 0x1000000
      content: Program
      mirror: false
    memory
      type: Flash
      size: 0x20000
      content: Save
      manufacturer: Macronix

-------------------------------------------------------------------------------------------------------
name:   Sennen Kazoku (Japan) (Rev 1) (Virtual Console)
  title:  Sennen Kazoku (Japan) (Rev 1) (Virtual Console)
  sha256: eb178c04d0773554395d8576cff5885af535dab0ae2c12ca5bef3b3131f2ccf3
  board
    memory
      type: ROM
      size: 0x1000000
      content: Program
      mirror: false
    memory
      type: Flash
      size: 0x20000
      content: Save
      manufacturer: Macronix