armv8/fsl_lsch3: Change arch to fsl-layerscape

There are two LS series processors are built on ARMv8 Layersacpe
architecture currently, LS2085A and LS1043A. They are based on
ARMv8 core although use different chassis, so create fsl-layerscape
to refactor the common code for the LS series processors which also
paves the way for adding LS1043A platform.

Signed-off-by: Mingkai Hu <Mingkai.Hu@freescale.com>
Signed-off-by: Hou Zhiqiang <B48286@freescale.com>
Signed-off-by: Gong Qianyu <Qianyu.Gong@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/board/freescale/ls2085a/Kconfig b/board/freescale/ls2085a/Kconfig
index f51afc8..042f85b 100644
--- a/board/freescale/ls2085a/Kconfig
+++ b/board/freescale/ls2085a/Kconfig
@@ -7,7 +7,7 @@
 	default "freescale"
 
 config SYS_SOC
-	default "fsl-lsch3"
+	default "fsl-layerscape"
 
 config SYS_CONFIG_NAME
 	default "ls2085a_emu"
@@ -23,7 +23,7 @@
 	default "freescale"
 
 config SYS_SOC
-	default "fsl-lsch3"
+	default "fsl-layerscape"
 
 config SYS_CONFIG_NAME
 	default "ls2085a_simu"