mtd: spi-nor-ids: Enable quad read for Gigadevice gd25lq128

mtd: spi-nor-ids: Enable quad read for Gigadevice gd25lq128

The Gigadevice gd25lq128 serial flash exists in different versions,
all which identify themselves using the same JEDEC id.

gd25lq128c:
https://www.gigadevice.com/datasheet/gd25lq128

gd25lq128d:
https://www.gigadevice.com/datasheet/gd25lq128d

However, all versions support quad read, so enable it.
Tested and verified on the Sipeed MAix BiT board.

Fixes: 30b9a28a3f2d ("mtd: spi-nor-ids: Add Gigadevice gd25lq128 ID")
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>