armv8: ls2080a: Drop macro CONFIG_LS2080A

Use CONFIG_ARCH_LS2080A instead.

Signed-off-by: York Sun <york.sun@nxp.com>
diff --git a/arch/arm/include/asm/arch-fsl-layerscape/fsl_serdes.h b/arch/arm/include/asm/arch-fsl-layerscape/fsl_serdes.h
index 70181c5..a8f9a50 100644
--- a/arch/arm/include/asm/arch-fsl-layerscape/fsl_serdes.h
+++ b/arch/arm/include/asm/arch-fsl-layerscape/fsl_serdes.h
@@ -9,7 +9,7 @@
 
 #include <config.h>
 
-#ifdef CONFIG_LS2080A
+#ifdef CONFIG_ARCH_LS2080A
 enum srds_prtcl {
 	/*
 	 * Nobody will check whether the device 'NONE' has been configured,