ARM: dts: aspeed: zaius: Add pcie-e2b-present gpio key

Add GPIO key to check presence of PCIE E2B.
Signed-off-by: Lei YU <mine260309@gmail.com>
Acked-by: Xo Wang <xow@google.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>

arch/arm/boot/dts/aspeed-bmc-opp-zaius.dts

@@ -55,6 +55,12 @@ checkstop {
 			gpios = <&gpio ASPEED_GPIO(F, 7) GPIO_ACTIVE_LOW>;
 			linux,code = <ASPEED_GPIO(F, 7)>;
 		};
+
+		pcie-e2b-present{
+			label = "pcie-e2b-present";
+			gpios = <&gpio ASPEED_GPIO(E, 7) GPIO_ACTIVE_LOW>;
+			linux,code = <ASPEED_GPIO(E, 7)>;
+		};
 	};
 
 	leds {