microblaze: Switch ELF_ARCH code to 189

Switch arch code to 189, the registered code in the upstream
version of binutils. Continue to accept the experimental 0xbaab.

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
diff --git a/arch/microblaze/kernel/ptrace.c b/arch/microblaze/kernel/ptrace.c
index 6a8e0cc..043cb58 100644
--- a/arch/microblaze/kernel/ptrace.c
+++ b/arch/microblaze/kernel/ptrace.c
@@ -148,7 +148,7 @@
 		ret = -1L;
 
 	if (unlikely(current->audit_context))
-		audit_syscall_entry(EM_XILINX_MICROBLAZE, regs->r12,
+		audit_syscall_entry(EM_MICROBLAZE, regs->r12,
 				    regs->r5, regs->r6,
 				    regs->r7, regs->r8);