mm: cma: add the CMA instance name to cma trace events

mm: cma: add the CMA instance name to cma trace events

There were missing places to add cma instance name.  To identify each CMA
instance, let's add the name for every cma trace.  This patch also changes
the existing cma_trace_alloc to cma_trace_finish since we have
cma_alloc_start[1].

[1] https://lore.kernel.org/linux-mm/20210324160740.15901-1-georgi.djakov@linaro.org

Link: https://lkml.kernel.org/r/20210330220237.748899-1-minchan@kernel.org
Signed-off-by: Minchan Kim <minchan@kernel.org>
Cc: Liam Mark <lmark@codeaurora.org>
Cc: Georgi Djakov <georgi.djakov@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>