ARM: dts: at91: sama7g5: Swap rx and tx for spi11

Swap the rx and tx of the DMA related DT properties of the spi11 node
in order to maintain consistency across Microchip/Atmel SoC files.

Signed-off-by: Sergiu Moga <sergiu.moga@microchip.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20220913142205.162399-2-sergiu.moga@microchip.com