Eliminate spurious COMPILE_FOR_BPFLOADER_VERSION macro

and make platform bpf.o's target V's platform bpfloader.

Note that all mainline shipped bpf.o's already manually
specify BPFLOADER_MIN_VER.

Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I67b73969def24e1e169c70c5fb1a402bf6e8cabc
3 files changed