Add Quad SPI driver for StarFive JH7110 SoC

Merge series from William Qiu <william.qiu@starfivetech.com>:

This patchset adds initial rudimentary support for the StarFive
Quad SPI controller driver. And this driver will be used in
StarFive's VisionFive 2 board.The first patch constrain
minItems/maxItems of resets for JH7110 QSPI and Patch 2 adds
support for StarFive JH7110 QSPI.