Add shader disassembler and uniforms decoder

This adds disassembler for gpir and ppir and adds decoding uniforms to float values.

Disassembler code is mostly copy and pasted from the lima disassemblers which are part of mesa.

This MR superseeds !9 (closed) because it includes its commits.

mentioned in merge request !9 (closed)

added 5 commits

• 0c6a2ff8 - 1 commit from branch lima:master
• 75b42231 - Decode uniforms to floats
• 9aaa7f73 - Move mali_half_to_float to new lima_util.h
• fec86d41 - Implement fragment shader disassembler
• 630316cd - Implement vertex shader disassembler

Compare with previous version

LGTM. Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com>

Looks good to me too, Reviewed-by: Erico Nunes <nunes.erico@gmail.com>

added 4 commits

• 9dae224b - Decode uniforms to floats
• 71cec12e - Move mali_half_to_float to new lima_util.h
• 21d1ca1e - Implement fragment shader disassembler
• 9181172b - Implement vertex shader disassembler

Compare with previous version

merged