tracing/histogram: Fix semicolon.cocci warnings

tracing/histogram: Fix semicolon.cocci warnings

kernel/trace/trace_events_hist.c:6039:2-3: Unneeded semicolon

 Remove unneeded semicolon.

Generated by: scripts/coccinelle/misc/semicolon.cocci

Link: https://lkml.kernel.org/r/20211030005615.GA41257@3074f0d39c61
Fixes: 7b2c035fed13 ("tracing/histogram: Simplify handling of .sym-offset in expressions")
CC: Kalesh Singh <kaleshsingh@google.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: kernel test robot <lkp@intel.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>