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Add initial support for System Management Agent (SMA) programmer. SMA is a SOC which is working as a side band management on Nvidia server board. One of its functionality is to flash firmware to other components. Test: 1. Build flashrom with this change. 2. Run operation: erase, write, read 3. All operations completed with expected performance. NV_SMA_SPI has been tested with the following SPI flash models: w25r128jw w25r64jv w25q16v Change-Id: I6b2522788db3dcee2b30faff29f605cede8c0eaf Co-Developed-by: Gilbert Chen <gilbertc@nvidia.com> Co-Developed-by: Willie Thai <wthai@nvidia.com> Signed-off-by: Willie Thai <wthai@nvidia.com> Signed-off-by: Gilbert Chen <gilbertc@nvidia.com> Reviewed-on: https://review.coreboot.org/c/flashrom/+/88816 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Peter Marheine <pmarheine@chromium.org> Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>