Glide64/Glitch64) Remove unneeded Glide functions
(Glide64) Simplify grTexFormatSize
Remove some more glide64_gSP stuff
Cleanup glide64_gDP.h stuff
(Glide64) Take out custom log/pow functions
Revert "(Glide64) Take out custom log/pow functions"

This reverts commit 355cef37795d46774e5b8086fcce9ee9a50471b1.
Don't run update_variables every time in retro_run
Make commit for shared contexts
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