Enable SLUB mem allocater. 

This is experimental. Please revert if the kernel doesn't boot.
Add FBCON for better debugging

Please remove this once the kernel is fully stable.
If enabling this causes KPanic, please revert.
Merge pull request #1 from HGTeam/5830-kernel

5830 kernel
Merge pull request #1 from nitubhaskar/5830-kernel

5830 kernel