armv8: fsl-layerscape: Add NXP LS2088A SoC support

The QorIQ LS2088A SoC is built on layerscape architecture.

It is similar to LS2080A SoC with some differences like
1)Timer controller offset is different
2)It has A72 cores
3)It supports TZASC module

Signed-off-by: Priyanka Jain <priyanka.jain@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/board/freescale/ls2080aqds/README b/board/freescale/ls2080aqds/README
index f288750..2808bd5 100644
--- a/board/freescale/ls2080aqds/README
+++ b/board/freescale/ls2080aqds/README
@@ -2,14 +2,14 @@
 --------
 The LS2080A Development System (QDS) is a high-performance computing,
 evaluation, and development platform that supports the QorIQ LS2080A
-Layerscape Architecture processor. The LS2080AQDS provides validation and
-SW development platform for the Freescale LS2080A processor series, with
-a complete debugging environment.
+and LS2088A Layerscape Architecture processor. The LS2080AQDS provides
+validation and SW development platform for the Freescale LS2080A, LS2088A
+processor series, with a complete debugging environment.
 
-LS2080A SoC Overview
+LS2080A, LS2088A SoC Overview
 --------------------
-Please refer arch/arm/cpu/armv8/fsl-layerscape/doc/README.soc for LS2080A
-SoC overview.
+Please refer arch/arm/cpu/armv8/fsl-layerscape/doc/README.soc for LS2080A,
+LS2088A SoC overview.
 
  LS2080AQDS board Overview
  -----------------------