Explorer board 2v0 bsp_config does not support flash writes

[xmos-jmccarthy]

System information

• OS: All
• xcore board: Explorer
• All that include explorer board 2v0 from initial addition to at least c6679cf

Describe the current behavior
Flash writes will fail to work

Describe the expected behavior
Flash writes should work

Standalone code to reproduce the issue
Not needed

Other info or logs
The flash part used in the 1V0-1V2 boards had the programming done with command over SDO0, and addr + data over data lines.
https://github.com/xmos/fwk_rtos/blob/79f265cf84046826987d7eb850840870011e275e/modules/bsp_config/XCORE-AI-EXPLORER_2V0/platform/platform_init.c#L83
The 2V0 flash part requires command and addr over SDIO0 and data over data lines.
qspi_flash_page_program_1_4_4 should be replaced with qspi_flash_page_program_1_1_4 for uses with the Explorer Board 2V0