powerpc: Use the TRAP macro whenever comparing a trap number

Trap numbers can have extra bits at the bottom that need to
be filtered out. There are a few cases where we don't do that.

It's possible that we got lucky but better safe than sorry.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index f3eb61b..d61989b 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -1564,7 +1564,7 @@
 	u8 status;
 	bool hv;
 
-	hv = (regs->trap == 0xf80);
+	hv = (TRAP(regs) == 0xf80);
 	if (hv)
 		value = mfspr(SPRN_HFSCR);
 	else