SYS_PREFIX was missing for a powerpc, which made a kprobe test to
sys_prctl fail.

Add missing SYS_PREFIX for powerpc.

Fixes: 7e92e01b7245 ("powerpc: Provide syscall wrapper")
Fixes: 94746890202c ("powerpc: Don't add __powerpc_ prefix to syscall entry points")
Signed-off-by: Saket Kumar Bhaskar <skb99@linux.ibm.com>
---
 tools/testing/selftests/bpf/progs/bpf_misc.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/testing/selftests/bpf/progs/bpf_misc.h b/tools/testing/selftests/bpf/progs/bpf_misc.h
index eccaf955e394..ae6beb2fb480 100644
--- a/tools/testing/selftests/bpf/progs/bpf_misc.h
+++ b/tools/testing/selftests/bpf/progs/bpf_misc.h
@@ -160,6 +160,9 @@
 #elif defined(__TARGET_ARCH_riscv)
 #define SYSCALL_WRAPPER 1
 #define SYS_PREFIX "__riscv_"
+#elif defined(__TARGET_ARCH_powerpc)
+#define SYSCALL_WRAPPER 1
+#define SYS_PREFIX ""
 #else
 #define SYSCALL_WRAPPER 0
 #define SYS_PREFIX "__se_"
-- 
2.43.5