[V9.1] No STM32 DMA2D Support

[kdschlosser]

Here is the reason as to why.

Enabling/Disabling DMA2D doesn't have any impact on the performance

Hi, I made many measurements when implemented the DMA2D support and I found that usually it’s really not faster then LVGL’s software rendering. DMA2D supports very simple opearations: fill an area copy an area blend two areas with opacity and color format conversations during this operations but we don’t use it For fill area and copy area apparently DMA2D can not work faster than a well-written memset or memcpy. For blending DMA2D could be faster but SW rendering is very well optimized her…