os/drivers/lcd : update spi frequency to maximum 50 MHz

Samsung / TizenRT

TizenRT is a lightweight RTOS-based platform to support low-end IoT devices

Apache License 2.0

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Closed anjana348 closed 4 months ago

anjana348 commented 4 months ago

Update spi frequency to 50MHz from 48MHz. Removed unnecessary code which was using slowed down api after DMA support