dra7xx: configure for rtos usecase to bulild

example for in hlos add rtos usecase to build.

commit f01f061b6db87566e9623ebf43b2466586e1f9fb
Date:   Fri May 10 17:06:40 2019 +0800

    VSDK build: add RTOS usecases to build

diff --git a/apps/Makefile b/apps/Makefile
index 033b932..03ee1f5 100755
--- a/apps/Makefile
+++ b/apps/Makefile
@@ -66,6 +66,11 @@ ifeq ($(ROBUST_RVC_INCLUDE), yes)
 include $(USECASES)
 endif
 
+ifeq ($(LATE_ATTACH_ENABLE), yes)
+-include $(MODULE_SRC_BASE_PATH)/rtos/usecases/common/SRC_FILES.MK
+include $(USECASES)
+endif
+
 ifneq ($(RADAR_ONLY),yes)
 -include $(MODULE_SRC_BASE_PATH)/rtos/common_srv/SRC_FILES.MK
 endif
diff --git a/apps/configs/tda2xx_evm_linux_all/cfg.mk b/apps/configs/tda2xx_evm_linux_all/cfg.mk
index 1ece1b2..b0ec409 100755
--- a/apps/configs/tda2xx_evm_linux_all/cfg.mk
+++ b/apps/configs/tda2xx_evm_linux_all/cfg.mk
@@ -96,6 +96,7 @@ DSS_INCLUDE=yes
 
 AVB_INCLUDE=no
 
+EARLY_VIDEO_INCLUDE=yes
 #
 # Enable below macro to enable DCAN integration into Vision SDK.
 #
@@ -109,6 +110,8 @@ CPU_IDLE_ENABLED=yes
 #
 DATA_VIS_INCLUDE=no
 
+# Enable/Disable late attach (yes/no)
+LATE_ATTACH_ENABLE=yes
 #
 # Enable below macro to enable OPENVX into Vision SDK
 #