iwlwfifi: fix WANT_DEV_COREDUMP selection in Kconfig

Fix my mistake while sending Johannes's

commit aadede6e9f4c8ee46808b2f697b714ee50810e23
Author: Johannes Berg <johannes.berg@intel.com>
Date:   Thu Oct 9 17:01:36 2014 +0200

    iwlwifi: mvm: port to devcoredump framework

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/Kconfig b/drivers/net/wireless/iwlwifi/Kconfig
index 139de90..ab019b4 100644
--- a/drivers/net/wireless/iwlwifi/Kconfig
+++ b/drivers/net/wireless/iwlwifi/Kconfig
@@ -59,7 +59,7 @@
 
 config IWLMVM
 	tristate "Intel Wireless WiFi MVM Firmware support"
-	select BACKPORT_WANT_DEV_COREDUMP
+	select WANT_DEV_COREDUMP
 	help
 	  This is the driver that supports the MVM firmware which is
 	  currently only available for 7260 and 3160 devices.