mtd: spinand: gigadevice: Add support for GD5F1GM9 chips

- GD5F1GM9UExxG (ID:c89101 3.3V)
- GD5F1GM9RExxG (ID:c88101 1.8V)

Both device feature:
  - 1Gb density (1024 blocks)
  - 2048-byte page size with 128-byte OOB
  - 8-bit ECC requirement per 512 bytes
  - Quad I/O Read support (opcode EBH)
  - tPROG ≤ 300us typical page program time

Testing environment:
  - Platform: Raspberry PI-5 (Linux raspberry 6.15.0-rc6-v8)
  - Operations verified:
    * Full device read/write/erase cycles on all blocks
    * Nandspeed:
      ~ GD5F1GM9UE: 2.75MB/s read, 1.99MB/s write, 41.26MB/s erase
      ~ GD5F1GM9RE: 1.84MB/s read, 1.45MB/s write, 41.04MS/s erase
    * Nandbiterrs: Both corredted 8-bit errors per 512 bytes
    * Stresstest: Both 144k cycles 0 bad block growth

Full test log:
 -U: https://gist.github.com/WT-886/b0f41fb50ddac3adc0020222c1f89b61
 -R: https://gist.github.com/WT-886/8784e72f4632d519814928ff49225963

Datasheet:
 -https://github.com/WT-886/DATASHEET/blob/main/GD5F1GM9-v1.0.pdf



Signed-off-by: Teng Wu <gigadevice2025@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>