MPC5200 does not boot

Hi Benjamin,

the following commit causes my MPC5200 not to boot.

    commit 9402c684613163888714df0955fa1f17142b08bf
    Author: Benjamin Herrenschmidt [off-list ref]
    Date:   Tue Jul 5 15:03:41 2016 +1000
     
        powerpc: Factor do_feature_fixup calls
        
        32 and 64-bit do a similar set of calls early on, we move it all to
        a single common function to make the boot code more readable.
        
        Signed-off-by: Benjamin Herrenschmidt [off-list ref]
        Signed-off-by: Michael Ellerman [off-list ref]

I suspect that the cause will be similar as described in commit
1cd03890ea64795e53f17a94928cca22495acb2a. Unfortunately, I don't have
much time to debug this, but I can easily test patches.

Best regards,
-Michal