Move shared bptc functions to texcompress_bptc_tmp.h:
* fetch_rgba_unorm_from_block
* fetch_rgb_float_from_block
* compress_rgba_unorm
* compress_rgb_float
Create decompress functions:
* decompress_rgba_unorm
* decompress_rgb_float
Functions will be reused in gallium/auxiliary code.
v2: Add bloc
Move shared bptc functions to texcompress_bptc_tmp.h:
* fetch_rgba_unorm_from_block
* fetch_rgb_float_from_block
* compress_rgba_unorm
* compress_rgb_float
Create decompress functions:
* decompress_rgba_unorm
* decompress_rgb_float
Functions will be reused in gallium/auxiliary code.
v2: Add bloc