fsl-ch3/README: Add description for NOR flash layout (firmware images)

This patch adds description for NOR flash layout (firmware images)
in the README file for LS2085A platforms.

Signed-off-by: Bhupesh Sharma <bhupesh.sharma@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>

arch/arm/cpu/armv8/fsl-lsch3/README

@@ -8,3 +8,28 @@ Freescale LayerScape with Chassis Generation 3
 
 This architecture supports Freescale ARMv8 SoCs with Chassis generation 3,
 for example LS2085A.
+
+Flash Layout
+============
+A typical layout of various images (including Linux and other firmware images)
+is shown below considering a 32MB NOR flash device:
+
+	-------------------------
+	|	linux		|
+	------------------------- ----> 0x0120_0000
+	|	Debug Server 	|
+	------------------------- ----> 0x00C0_0000
+	|	AIOP SW 	|
+	------------------------- ----> 0x0070_0000
+	|	MC FW 		|
+	------------------------- ----> 0x006C_0000
+	| MC Data Path Layout 	|
+	------------------------- ----> 0x0020_0000
+	|	BootLoader 	|
+	------------------------- ----> 0x0000_1000
+	|	PBI 		|
+	------------------------- ----> 0x0000_0080
+	|	RCW 		|
+	------------------------- ----> 0x0000_0000
+
+	32-MB NOR flash layout