README.hardware: remove u-boot flashing instructions for mpc8315e-rdb

Upgrading u-boot is apparently not necessary with current board revisions,
and these instructions may not work properly anyway (our toolchain seems not
to be able to compile u-boot in the way described), and given that they are
potentially risky they should be removed.

(From OE-Core rev: 52a85e805797bff2ec53b2356da8daf224460e9e)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

README.hardware

@@ -234,32 +234,7 @@ You will need the following:
 * nfs root setup on your workstation
 * tftp server installed on your workstation
 
-The original U-Boot image on board can't boot kernel versions 2.6.34 or later
-successfully, so the U-Boot image should be upgraded to the latest U-Boot.
-
- 1. First build a new U-Boot image for mpc8315e-rdb, u-boot.bin.mpc8315erdb,
-    then make it available on your tftp server. To compile the new u-boot:
-
- $ git clone git://git.denx.de/u-boot.git
- $ cd u-boot
- $ git checkout -b v2010.09-mpc8315erdb v2010.09
- $ make ARCH=powerpc CROSS_COMPILE=<powerpc cross compiler path> MPC8315ERDB_config
- $ make ARCH=powerpc CROSS_COMPILE=<powerpc cross compiler path> all
- $ cp u-boot.bin u-boot.bin.mpc8315erdb
-
- 2. Set up the environment in U-Boot:
-
- =>setenv ipaddr <board ip>
- =>setenv serverip <tftp server ip>
-
- 3. Flash the new U-Boot image:
-
- =>tftp 200000 u-boot.bin.mpc8315erdb
- =>protect off all
- =>erase fe000000 +60000
- =>cp.b 200000 fe000000 60000
-
-Then the kernel can be booted successfully:
+Load the kernel and boot it as follows:
 
  1. Get the kernel (uImage.mpc8315erdb) and dtb (mpc8315erdb.dtb) files from
     the Poky build tmp/deploy directory, and make them available on your tftp
@@ -267,6 +242,8 @@ Then the kernel can be booted successfully:
 
  2. Set up the environment in U-Boot:
 
+ =>setenv ipaddr <board ip>
+ =>setenv serverip <tftp server ip>
  =>setenv bootargs root=/dev/nfs rw nfsroot=<nfsroot ip>:<rootfs path> ip=<board ip>:<server ip>:<gateway ip>:255.255.255.0:mpc8315e:eth0:off console=ttyS0,115200
 
  3. Download kernel and dtb to boot kernel.