ARM: dts: at91: sama7g5ek: add pinctrl for sdmmc1 and flx3

Add pinctrl for sdmmc1 and flx3.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
diff --git a/arch/arm/dts/sama7g5ek-u-boot.dtsi b/arch/arm/dts/sama7g5ek-u-boot.dtsi
index 4af4d1b..5e1a0d5 100644
--- a/arch/arm/dts/sama7g5ek-u-boot.dtsi
+++ b/arch/arm/dts/sama7g5ek-u-boot.dtsi
@@ -39,6 +39,10 @@
 	};
 };
 
+&pinctrl_flx3_default {
+	u-boot,dm-pre-reloc;
+};
+
 &pit64b0 {
 	u-boot,dm-pre-reloc;
 };