armv8: ls1088a: Add NXP LS1088A SoC support

LS1088A is compliant with the Layerscape Chassis Generation 3 with
eight ARM v8 Cortex-A53 cores in 2 cluster, CCI-400, one 64-bit DDR4
SDRAM memory controller with ECC, Data path acceleration architecture
2.0 (DPAA2), Ethernet interfaces (SGMIIs, RGMIIs, QSGMIIs, XFIs),
QSPI, IFC, PCIe, SATA, USB, SDXC, DUARTs etc.

Signed-off-by: Alison Wang <alison.wang@nxp.com>
Signed-off-by: Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>
Signed-off-by: Ashish Kumar <Ashish.Kumar@nxp.com>
Signed-off-by: Raghav Dogra <raghav.dogra@nxp.com>
Signed-off-by: Shaohui Xie <Shaohui.Xie@nxp.com>
[YS: Revised commit message]
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/doc/README.soc b/arch/arm/cpu/armv8/fsl-layerscape/doc/README.soc
index 3ae16ae..276ab90 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/doc/README.soc
+++ b/arch/arm/cpu/armv8/fsl-layerscape/doc/README.soc
@@ -1,11 +1,12 @@
 SoC overview
 
 	1. LS1043A
-	2. LS2080A
-	3. LS1012A
-	4. LS1046A
-	5. LS2088A
-	6. LS2081A
+	2. LS1088A
+	3. LS2080A
+	4. LS1012A
+	5. LS1046A
+	6. LS2088A
+	7. LS2081A
 
 LS1043A
 ---------
@@ -45,6 +46,38 @@
    - Integrated flash controller supporting NAND and NOR flash
  - QorIQ platform's trust architecture 2.1
 
+LS1088A
+--------
+The QorIQ LS1088A processor is built on the Layerscape
+architecture combining eight ARM A53 processor cores
+with advanced, high-performance datapath acceleration
+and networks, peripheral interfaces required for
+networking, wireless infrastructure, and general-purpose
+embedded applications.
+
+LS1088A is compliant with the Layerscape Chassis Generation 3.
+
+Features summary:
+ - 8 32-bit / 64-bit ARM v8 Cortex-A53 CPUs
+ - Cores are in 2 cluster of 4-cores each
+ - 1MB L2 - Cache per cluster
+ - Cache coherent interconnect (CCI-400)
+ - 1 64-bit DDR4 SDRAM memory controller with ECC
+ - Data path acceleration architecture 2.0 (DPAA2)
+ - 4-Lane 10GHz SerDes comprising of WRIOP
+ - 4-Lane 10GHz SerDes comprising of PCI, SATA, uQE(TDM/HLDC/UART)
+ - Ethernet interfaces: SGMIIs, RGMIIs, QSGMIIs, XFIs
+ - QSPI, SPI, IFC2.0 supporting NAND, NOR flash
+ - 3 PCIe3.0 , 1 SATA3.0, 2 USB3.0, 1 SDXC, 2 DUARTs etc
+ - 2 DUARTs
+ - 4 I2C, GPIO
+ - Thermal monitor unit(TMU)
+ - 4 Flextimers and 1 generic timer
+ - Support for hardware virtualization and partitioning enforcement
+ - QorIQ platform's trust architecture 3.0
+ - Service processor (SP) provides pre-boot initialization and secure-boot
+   capabilities
+
 LS2080A
 --------
 The LS2080A integrated multicore processor combines eight ARM Cortex-A57