[U-Boot-Users] [PATCH] fix system config overwrite @ MPC834x and MPC8313

[Andre Schwarz]

During 83xx setup the "System I/O configuration register high" gets
overwritten with user defined value if CFG_SICRH is defined.

Regarding to the MPC834x manual (Table 5-28 reve.1) bits 28+29 of SICRH 
must keep their reset value regardless of configuration.

On my board (using RGMII) those bits are set after reset - yet it's 
unclear where they come from.

The patch keeps both bits on MPC834x and MPC8313.

Signed-off-by: Andre Schwarz <andre.schwarz at matrix-vision.de>
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MATRIX VISION GmbH, Talstraße 16, DE-71570 Oppenweiler  - Registergericht: Amtsgericht Stuttgart, HRB 271090
Geschäftsführer: Gerhard Thullner, Werner Armingeon, Uwe Furtner
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