qcacld-3.0: Enable the Export Symbol config by default

Enable the Export Symbol config by default because it is a basic
requirement for other modules to use our driver.

Change-Id: I8c1b71fe921db53013d998e36e11f2d388a2eacf
CRs-Fixed: 3586360

configs/default_defconfig

@@ -422,11 +422,7 @@ endif
 CONFIG_WLAN_FEATURE_MEDIUM_ASSESS := y
 
 #Disable the Export Symbol config
-ifeq ($(CONFIG_QCACLD_FEATURE_SON), y)
 CONFIG_WLAN_DISABLE_EXPORT_SYMBOL := n
-else
-CONFIG_WLAN_DISABLE_EXPORT_SYMBOL := y
-endif
 
 CONFIG_QCACLD_FEATURE_GREEN_AP := y