Modify framebuffer and NGA framebuffer to read screen size from board model dtb file. Optimise memory usuage of frame buffer Add example minigui application with hooks to profiler (which writes results to S:\). Modified NGA framebuffer to run its own dfc queue at high priority

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struct target_pt_regs {

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	abi_ulong psr;

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	abi_ulong pc;

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	abi_ulong npc;

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	abi_ulong y;

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	abi_ulong u_regs[16];

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};

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#define UNAME_MACHINE "sun4"