ARM: dts: at91: sama7g5: use generic name for securam

Use generic sram name for securam.

Signed-off-by: Claudiu Beznea <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

arch/arm/boot/dts/sama7g5.dtsi

···
 			};
 		};
 
-		securam: securam@e0000000 {
+		securam: sram@e0000000 {
 			compatible = "microchip,sama7g5-securam", "atmel,sama5d2-securam", "mmio-sram";
 			reg = <0xe0000000 0x4000>;
 			clocks = <&pmc PMC_TYPE_PERIPHERAL 18>;