tests: drivers: spi driver testing on the stm32h573i_dk board (dma)

Configure the tests/drivers/spi/spi_loopback to run on the
stm32h573i_dk disco kit with DMA transfer
use gpdma1 or gpdma2.
GPDMA1 or GPDMA2 have the same request for spi2 transfer.
Connect D11 and D12  of the ARDuino CN13 connector to PASS the test.

Signed-off-by: Francois Ramu <francois.ramu@st.com>