powerpc: Only print PACATMSCRATCH in oops when TM is active

If TM is not active there is no need to print PACATMSCRATCH
so we can save ourselves a line.
Signed-off-by: Anton Blanchard <anton@samba.org>
Acked-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/kernel/process.c

@@ -871,6 +871,7 @@ void show_regs(struct pt_regs * regs)
 	printk("SOFTE: %ld ", regs->softe);
 #endif
 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+	if (MSR_TM_ACTIVE(regs->msr))
 		printk("\nPACATMSCRATCH: %016llx ", get_paca()->tm_scratch);
 #endif