common/board_f.c: fix compile error when tracing disabled

common/board_f.c: fix compile error when tracing disabled

When CONFIG_TRACE is disabled, linking fails with:

common/built-in.o:(.data.init_sequence_f+0x8): undefined reference to `trace_early_init'

To fix, wrap trace init calls with #ifdef CONFIG_TRACE.

While at it, remove the static inline version of the init call from
trace.h as suggested by Simon Glass, since it doesnt work.

Cc: Simon Glass <[email protected]>
Cc: Tom Rini <[email protected]>
Signed-off-by: Kevin Hilman <[email protected]>
Acked-by: Simon Glass <[email protected]>