panfrost: Rename bifrost_framebuffer->mali_framebuffer

(And bifrost_fb_extra to mali_framebuffer_extra, bifrost_render_target
to mali_render_target)

These structures are the norm on midgard t760+, drop the bifrost names,
it's silly... unrelated to the rest of the series but while I'm messing
with pandecode and cleaning up bifrost abstractions, might as well.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3835>
4 files changed