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Requirement: The BSP for the k230 platform in the RT-Thread repository does not yet have an spi driver. Solution: Provide spi driver for the k230 platform in the RT-Thread repository. - Supports SPI0(OSPI) controller with 1/2/4/8 data lines. - Supports SPI1(QSPI0) and SPI2(QSPI1) controllers with 1/2/4 data lines. - Implements DMA-based transfers for OSPI, QSPI, and DSPI modes. - Falls back to standard IRQ-driven transfers for legacy SPI mode (single line). - Updates documentation in bsp/README.md Signed-off-by: ChuanN-sudo <fjchuanil@gmail.com>