broadcom/vc5: Fix up integer texture handling.

The original spec I had didn't expose integer textures and suggested that
you use unfiltered floats.  Now there are proper formats for them.

Fixes 16- and 32-bit texwrap integer tests in piglit, and
dEQP-GLES3.functional.fbo.completeness.renderable.renderbuffer.color0.rgb10_a2ui.
2 files changed