Revert "vendor: omni: Do not enable telephony-ext as a global feature"

It is necessary otherwise we will get soft reboots during calls.

This reverts commit f51e1fed3d004e14b23b107b63d49555b6eb029a.

Change-Id: Ib88c3a342b4ec67ea786c8493ef725fa42185279
diff --git a/config/common.mk b/config/common.mk
index 40815f0..5f0e32e 100644
--- a/config/common.mk
+++ b/config/common.mk
@@ -17,10 +17,6 @@
     ro.com.google.clientidbase=$(PRODUCT_GMS_CLIENTID_BASE)
 endif
 
-ifeq ($strip ($BOARD_USES_TELEPHONY_EXTENSION),)
-BOARD_USES_TELEPHONY_EXTENSION := true
-endif
-
 # general properties
 PRODUCT_PROPERTY_OVERRIDES += \
     ro.url.legal=http://www.google.com/intl/%s/mobile/android/basic/phone-legal.html \
diff --git a/config/packages.mk b/config/packages.mk
index 232794d..e0089b8 100644
--- a/config/packages.mk
+++ b/config/packages.mk
@@ -42,10 +42,8 @@
     fsck.ntfs
 
 # Telephony extension
-ifeq ($strip ($BOARD_USES_TELEPHONY_EXTENSION),true)
 PRODUCT_PACKAGES += telephony-ext
 PRODUCT_BOOT_JARS += telephony-ext
-endif
 
 # OMS support
 PRODUCT_PACKAGES += ThemeInterfacer