v3d: Fix blitting from a linear winsys BO.

This is the case for the simulator environment, and broke many blitter
tests by trying to texture from linear while the HW can only actually do
UIF/UBLINEAR/LT.  Just make a temporary and copy into it with the CPU,
then blit from that.

This is the kind of path that should use the TFU, but I haven't exposed
that hardware yet.

Fixes dEQP-GLES3.functional.fbo.blit.default_framebuffer.*
1 file changed