fix superiotool for NCT6776F

The current code exits config mode of the NCT6776F immediately after
detection, so the register dump shows all 0xffs. This patch adds code to
re-enter config mode for the register dump so that the register contents
can be read.

Change-Id: I4ad0c108b6411a665e31f55dea4b91ca77d1a5f7
Signed-off-by: Florian Zumbiehl <florz@florz.de>
Reviewed-on: http://review.coreboot.org/391
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
diff --git a/util/superiotool/nuvoton.c b/util/superiotool/nuvoton.c
index 6a1a75c..ed2eabc 100644
--- a/util/superiotool/nuvoton.c
+++ b/util/superiotool/nuvoton.c
@@ -255,7 +255,9 @@
 		printf("Found Nuvoton %s (id=0x%02x) at 0x%x\n",
 		       get_superio_name(reg_table, chip_id), chip_id, port);
 		chip_found = 1;
+		enter_conf_mode_winbond_fintek_ite_8787(port);
 		dump_superio("Nuvoton", reg_table, port, chip_id, LDN_SEL);
+		exit_conf_mode_winbond_fintek_ite_8787(port);
 		return;
 	}