mpc83xx: Revise the MPC8360EMDS readme doc

When the rev2.x silicon mount on the MPC8360EMDS baord,
and if you are using the u-boot version after the commit
3fc0bd159103b536e1c54c6f4457a09b3aba66ca.
to make the ethernet interface usable, we have to setup
the jumpers correctly.

Signed-off-by: Dave Liu <daveliu@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>

doc/README.mpc8360emds

@@ -21,7 +21,13 @@ Freescale MPC8360EMDS Board
 	SW3[1:8]= 0000_0001 refers to bits labeled 1 through 6 is set as "On"
 		and bits labeled 8 is set as "Off".
 
-1.1	For the MPC8360E PB PROTO Board
+1.1	There are three type boards for MPC8360E silicon up to now, They are
+
+	* MPC8360E-MDS-PB PROTO (a.k.a 8360SYS PROTOTYPE)
+	* MPC8360E-MDS-PB PILOT (a.k.a 8360SYS PILOT)
+	* MPC8360EA-MDS-PB PROTO (a.k.a 8360SYS2 PROTOTYPE)
+
+1.2	For all the MPC8360EMDS Board
 
 	First, make sure the board default setting is consistent with the
 	document shipped with your board. Then apply the following setting:
@@ -33,6 +39,21 @@ Freescale MPC8360EMDS Board
 	JP6 1-2
 	on board Oscillator: 66M
 
+1.3	Since different board/chip rev. combinations have AC timing issues,
+	u-boot forces RGMII-ID (RGMII with Internal Delay) mode on by default
+	by the patch (mpc83xx: Disable G1TXCLK, G2TXCLK h/w buffers).
+
+	When the rev2.x silicon mount on these boards, and if you are using
+	u-boot version after this patch, to make the ethernet interfaces usable,
+	and to enable RGMII-ID on your board, you have to setup the jumpers
+	correctly.
+
+	* MPC8360E-MDS-PB PROTO
+	  nothing to do
+	* MPC8360E-MDS-PB PILOT
+	  JP9 and JP8 should be ON
+	* MPC8360EA-MDS-PB PROTO
+	  JP2 and JP3 should be ON
 
 2.	Memory Map