ARM: dts: aspeed: Update spi alias in Facebook AST2500 Common dtsi

Set FMC controller to "spi0" in ast2500-facebook-netbmc-common.dtsi so
the spi bus is consistent with the flash labels defined in flash layout.
Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20230803230324.731268-2-rentao.bupt@gmail.comSigned-off-by: Joel Stanley <joel@jms.id.au>

arch/arm/boot/dts/aspeed/ast2500-facebook-netbmc-common.dtsi

@@ -4,6 +4,10 @@
 #include "aspeed-g5.dtsi"
 
 / {
+	aliases {
+		spi0 = &fmc;
+	};
+
 	memory@80000000 {
 		reg = <0x80000000 0x40000000>;
 	};