linux-user: convert target_munmap debug to a tracepoint

Convert the final bit of DEBUG_MMAP to a tracepoint and remove the
last remanents of the #ifdef hackery.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20191205122518.10010-6-alex.bennee@linaro.org>
diff --git a/linux-user/trace-events b/linux-user/trace-events
index 6d6aeef..f6de1b8 100644
--- a/linux-user/trace-events
+++ b/linux-user/trace-events
@@ -16,3 +16,4 @@
 target_mprotect(uint64_t start, uint64_t len, int flags) "start=0x%"PRIx64 " len=0x%"PRIx64 " prot=0x%x"
 target_mmap(uint64_t start, uint64_t len, int pflags, int mflags, int fd, uint64_t offset) "start=0x%"PRIx64 " len=0x%"PRIx64 " prot=0x%x flags=0x%x fd=%d offset=0x%"PRIx64
 target_mmap_complete(uint64_t retaddr) "retaddr=0x%"PRIx64
+target_munmap(uint64_t start, uint64_t len) "start=0x%"PRIx64" len=0x%"PRIx64