m7ul: rename device to m7

* Use this tree as the common M7 GSM tree

Change-Id: I7f145d3aa948c11121b6dae42603b87c2e9d36b5
diff --git a/BoardConfig.mk b/BoardConfig.mk
index 5032f5b..ef9e156 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -28,7 +28,7 @@
 -include device/htc/m7-common/BoardConfigCommon.mk
 
 # Assert
-TARGET_OTA_ASSERT_DEVICE := m7,m7ul
+TARGET_OTA_ASSERT_DEVICE := m7,m7att,m7tmo,m7ul
 
 # Bootloader
 TARGET_BOOTLOADER_BOARD_NAME := m7
@@ -68,4 +68,4 @@
 # mmcblk0p29: 06069e00 00000200 "reserve"
 
 # inherit from the proprietary version
--include vendor/htc/m7ul/BoardConfigVendor.mk
+-include vendor/htc/m7/BoardConfigVendor.mk