[display] Fix corruption in color lcd update, again.

target/dartuinoP0/memory_lcd.c

 /*
  * Copyright (c) 2015 Gurjant Kalsi <me@gurjantkalsi.com>
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files
  * (the "Software"), to deal in the Software without restriction,
  * including without limitation the rights to use, copy, modify, merge,
  * publish, distribute, sublicense, and/or sell copies of the Software,
  * and to permit persons to whom the Software is furnished to do so,
  * subject to the following conditions:
@@ skipping 73 matching lines @@
 
     chip_select(true);
     HAL_SPI_Transmit(&SpiHandle, clear, 2, HAL_MAX_DELAY);
     chip_select(false);
 }
 
 
 status_t memory_lcd_init(void)
 {
     SpiHandle.Instance               = SPI2;
-    SpiHandle.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_4;
+    SpiHandle.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_8;
     SpiHandle.Init.Direction         = SPI_DIRECTION_1LINE;
     SpiHandle.Init.CLKPhase          = SPI_PHASE_1EDGE;
     SpiHandle.Init.CLKPolarity       = SPI_POLARITY_LOW;
     SpiHandle.Init.DataSize          = SPI_DATASIZE_8BIT;
     SpiHandle.Init.FirstBit          = SPI_FIRSTBIT_LSB;
     SpiHandle.Init.TIMode            = SPI_TIMODE_DISABLE;
     SpiHandle.Init.CRCCalculation    = SPI_CRCCALCULATION_DISABLE;
     SpiHandle.Init.CRCPolynomial     = 7;
     SpiHandle.Init.NSS               = SPI_NSS_SOFT;
     SpiHandle.Init.Mode              = SPI_MODE_MASTER;
@@ skipping 94 matching lines @@
 {
     DEBUG_ASSERT(info);
     LTRACEF("display_info %p\n", info);
 
     info->format = MLCD_FORMAT;
     info->width = MLCD_WIDTH;
     info->height = MLCD_HEIGHT;
 
     return NO_ERROR;
 }