powerpc: Add transactional memory paca scratch register to show_regs

Add transactional memory paca scratch register to show_regs.  This is useful
for debugging.

Signed-off-by: Matt Evans <matt@ozlabs.org>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h
index 4b74c6c..77c91e7 100644
--- a/arch/powerpc/include/asm/paca.h
+++ b/arch/powerpc/include/asm/paca.h
@@ -137,6 +137,9 @@
 	u8 irq_work_pending;		/* IRQ_WORK interrupt while soft-disable */
 	u8 nap_state_lost;		/* NV GPR values lost in power7_idle */
 	u64 sprg3;			/* Saved user-visible sprg */
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+	u64 tm_scratch;                 /* TM scratch area for reclaim */
+#endif
 
 #ifdef CONFIG_PPC_POWERNV
 	/* Pointer to OPAL machine check event structure set by the