Synquacer: refactor hsspi nor driver
Created by: masahisak
This PR fully replaces the existing HSSPI NOR flash driver to newly designed driver.
The new driver implements NOR flash read/program/erase/reset APIs, and separates off the HSSPI controller specific module(hsspi) and NOR flash specific module(nor). With that, we can add the support of other devices such as NAND flash device.