ARM: dts: at91: sama7g5: add nodes for PDMC

Microchip's SAMA7G5 embeds two PDMCs. The PDMCs can be used to connect 2x4
PDM microphones.

Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/all/20220307122202.2251639-5-codrin.ciubotariu@microchip.com


Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>