ARM: dts: at91: sama7g5ek: add node for PDMC0

SAMA7G5-EK has 4 PDM microphones connected to PDMC0. PDMC0 pinmux is in
conflict with gmac1, gmac1 being enabled by default.

Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/all/20220307122202.2251639-6-codrin.ciubotariu@microchip.com


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