kselftest/arm64: Add a no-SVE loop after SVE in fp-pidbench

Some applications use SVE intermittently, one common case being where SVE
is used during statup (eg, by ld.so) but then rarely if ever during the
main application runtime. Add a repeat of the no SVE loop after we've done
the SVE loops to fp-pidbench to capture results for that.

Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>

Author: broonie

tools/testing/selftests/arm64/fp/fp-pidbench.S

@@ -63,6 +63,10 @@ function _start
 	puts	"SVE used per syscall: "
 	test_loop "rdvl x0, #8"
 
+	// Test non-SVE execution after SVE
+	puts	"No SVE after SVE: "
+	test_loop
+
 	//  And we're done
 out:
 	mov	x0, #0