This check can be done with uname which is more portable. At the same
time re-arrange it into a standard if statement so that it's more
readable.

Signed-off-by: James Clark <james.clark@arm.com>
---
 tools/perf/tests/shell/test_arm_callgraph_fp.sh | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/perf/tests/shell/test_arm_callgraph_fp.sh b/tools/perf/tests/shell/test_arm_callgraph_fp.sh
index 83b53591b1ea..61898e256616 100755
--- a/tools/perf/tests/shell/test_arm_callgraph_fp.sh
+++ b/tools/perf/tests/shell/test_arm_callgraph_fp.sh
@@ -6,7 +6,9 @@ shelldir=$(dirname "$0")
 # shellcheck source=lib/perf_has_symbol.sh
 . "${shelldir}"/lib/perf_has_symbol.sh
 
-lscpu | grep -q "aarch64" || exit 2
+if [ "$(uname -m)" != "aarch64" ]; then
+	exit 2
+fi
 
 if perf version --build-options | grep HAVE_DWARF_UNWIND_SUPPORT | grep -q OFF
 then
-- 
2.34.1