MLBEDSW-2688: Improved LUT support

- Support for more than one 256-byte LUT in SHRAM
- No DMA is performed for a LUT that is already located in SHRAM
- Added MemArea.Shram, used for LUT, to avoid false address collision
  asserts during SRAM tensor allocation
- Added read access to LUT in memory access calculation

Change-Id: If4d1eded5ed029d253f4f5efb2d80495fc3eac99
Signed-off-by: Louis Verhaard <louis.verhaard@arm.com>
diff --git a/ethosu/mlw_codec/test/test_mlw_codec.py b/ethosu/mlw_codec/test/test_mlw_codec.py
index 31a3bc0..d37462d 100644
--- a/ethosu/mlw_codec/test/test_mlw_codec.py
+++ b/ethosu/mlw_codec/test/test_mlw_codec.py
@@ -16,6 +16,7 @@
 # limitations under the License.
 # Simple example of the usage of mlw_codec.
 import pytest
+
 from ethosu import mlw_codec