MLECO-2348: Update dependencies to 21.08

* Update all dependancies to 21.08
* Refactoring to fit the new changes

Change-Id: Icc2ae3628ee6e8fbc0af2cd8f91e368c9ccae053
diff --git a/scripts/make/cortex_m_ethos_eval_makefile.inc b/scripts/make/cortex_m_ethos_eval_makefile.inc
index 407bc85..27bb9d6 100644
--- a/scripts/make/cortex_m_ethos_eval_makefile.inc
+++ b/scripts/make/cortex_m_ethos_eval_makefile.inc
@@ -127,15 +127,6 @@
     $(error "TOOLCHAIN=$(TOOLCHAIN) is not supported.")
   endif
 
-# TODO(#47718): resolve warnings.
-CXX_OMIT_ERRORS = \
-  -Wno-implicit-fallthrough \
-  -Wno-unused-variable
-
-# TODO: Remove when Arm Ethos-U NPU driver is updated to version > 21.05
-CC_OMIT_ERRORS = \
-  ${CXX_OMIT_ERRORS} \
-  -Wno-int-conversion
 
   PLATFORM_FLAGS = \
     -DTF_LITE_MCU_DEBUG_LOG \
@@ -151,7 +142,7 @@
     $(TARGET_SPECIFIC_FLAGS)
 
   # Common + C/C++ flags
-  CXXFLAGS += $(PLATFORM_FLAGS) ${CXX_OMIT_ERRORS}
-  CCFLAGS += $(PLATFORM_FLAGS) ${CC_OMIT_ERRORS}
+  CXXFLAGS += $(PLATFORM_FLAGS)
+  CCFLAGS += $(PLATFORM_FLAGS)
 
 endif