trace-cmd: Add hack to ignore ARM '$x' functions
trace-cmd: Add hack to ignore ARM '$x' functions

Some ARM boards add '$x' symbols into the kallsyms file:

00000000bf0007e8 $a [cfg80211]
00000000bf000890 $a [cfg80211]
00000000bf000a30 $d [cfg80211]
00000000bf000a40 $a [cfg80211]
00000000bf000e78 $d [cfg80211]
00000000bf000e88 $a [cfg80211]
00000000bf0011f8 $d [cfg80211]
00000000bf001244 $a [cfg80211]
00000000bf0012a8 $a [cfg80211]
00000000bf00131c $a [cfg80211]
00000000bf001340 $a [cfg80211]
00000000bf00146c $d [cfg80211]

Unfortunately, trace-cmd seems to pick these for the function
names it reports, making the function names totally useless.

Add a hack to not include these names in the function table of
trace-cmd.

Reported-by: Luciano Coelho <d1ef580865f8eb2e1d1c65bc406aba322cc98f3e@ti.com>
Signed-off-by: Steven Rostedt <43232e92d70cc7aa53504ad0397085ee47bad87f@goodmis.org>

bigzz/trace-cmd,bigzz/trace-cmd