modules: cmsis-nn: add pad

Add KConfig for the new cmsis-nn pad kernels.

Signed-off-by: Ryan McClelland <ryanmcclelland@meta.com>

modules/cmsis-nn/CMakeLists.txt

@@ -90,4 +90,9 @@ if(CONFIG_CMSIS_NN)
     zephyr_library_sources(${SRC})
   endif()
 
+  if(CONFIG_CMSIS_NN_PAD)
+    file(GLOB SRC "${CMSIS_NN_DIR}/Source/PadFunctions/*_s8.c")
+    zephyr_library_sources(${SRC})
+  endif()
+
 endif()

modules/cmsis-nn/Kconfig

@@ -78,6 +78,11 @@ config CMSIS_NN_LSTM
 	help
 	  This option enables the NN libraries for Long Short-Term Memory.
 
+config CMSIS_NN_PAD
+	bool "Pad"
+	help
+	  This option enables the NN libraries for the pad layers.
+
 config CMSIS_NN_TRANSPOSE
 	bool "Transpose"
 	help

modules/tflite-micro/Kconfig

@@ -29,6 +29,7 @@ config TENSORFLOW_LITE_MICRO_CMSIS_NN_KERNELS
 	select CMSIS_NN_SVD
 	select CMSIS_NN_LSTM
 	select CMSIS_NN_TRANSPOSE
+	select CMSIS_NN_PAD
 	help
 	  This option adds support for CMSIS-NN optimized kernels when using TensorFlow Lite Micro.