sfc: Log interrupt and reset type names, not numbers

Define name tables for these enumerations in a similar way as for
loopback.  Move the loopback name table together with them.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/sfc/selftest.c b/drivers/net/sfc/selftest.c
index afac1cc..63ff295 100644
--- a/drivers/net/sfc/selftest.c
+++ b/drivers/net/sfc/selftest.c
@@ -175,8 +175,8 @@
 	return -ETIMEDOUT;
 
  success:
-	EFX_LOG(efx, "test interrupt (mode %d) seen on CPU%d\n",
-		efx->interrupt_mode, efx->last_irq_cpu);
+	EFX_LOG(efx, "%s test interrupt seen on CPU%d\n", INT_MODE(efx),
+		efx->last_irq_cpu);
 	tests->interrupt = 1;
 	return 0;
 }