NHWC fixes

[kahmed10]

Also testing with NHWC enabled in the CI.

[migraphx-bot]

Test	Batch	Rate new 4d3a10	Rate old 3c0c78	Diff	Compare
torchvision-resnet50	64	2,836.25	2,836.54	-0.01%	✅
torchvision-resnet50_fp16	64	6,506.14	6,468.23	0.59%	✅
torchvision-densenet121	32	2,089.91	2,100.56	-0.51%	✅
torchvision-densenet121_fp16	32	3,667.42	3,666.39	0.03%	✅
cadene-inceptionv4	16	722.70	722.80	-0.01%	✅
cadene-resnext64x4	16	695.07	692.49	0.37%	✅
bert-mrpc-onnx	8	813.73	812.22	0.19%	✅
bert-mrpc-tf	1	378.42	389.92	-2.95%	✅
pytorch-examples-wlang-gru	1	347.70	306.15	13.57%	🔆
pytorch-examples-wlang-lstm	1	316.22	320.74	-1.41%	✅
torchvision-resnet50_1	1	605.34	606.14	-0.13%	✅
cadene-dpn92_1	1	415.31	415.97	-0.16%	✅
cadene-resnext101_1	1	330.90	331.06	-0.05%	✅
onnx-taau-downsample	1	285.80	305.45	-6.43%	🔴
dlrm-criteoterabyte	1	23.50	21.60	8.79%	🔆
dlrm-criteoterabyte_fp16	1	41.09	40.55	1.34%	✅
agentmodel	1	6,390.92	6,053.93	5.57%	🔆
unet_fp16	2	54.54	54.82	-0.50%	✅
resnet50v1_fp16	1	947.76	922.43	2.75%	✅
bert_base_cased_fp16	64	924.97	925.19	-0.02%	✅
bert_large_uncased_fp16	32	290.64	290.63	0.00%	✅
bert_large_fp16	1	167.33	171.80	-2.60%	✅
distilgpt2_fp16	16	1,514.43	1,513.79	0.04%	✅

This build is not recommended to merge 🔴

[migraphx-bot]

     ✅ bert-mrpc-onnx: PASSED: MIGraphX meets tolerance

     ✅ bert-mrpc-tf: PASSED: MIGraphX meets tolerance

     ✅ pytorch-examples-wlang-gru: PASSED: MIGraphX meets tolerance

     ✅ pytorch-examples-wlang-lstm: PASSED: MIGraphX meets tolerance

     ✅ torchvision-resnet50_1: PASSED: MIGraphX meets tolerance

     ✅ cadene-dpn92_1: PASSED: MIGraphX meets tolerance

     ✅ cadene-resnext101_1: PASSED: MIGraphX meets tolerance

     ✅ dlrm-criteoterabyte: PASSED: MIGraphX meets tolerance

     ✅ agentmodel: PASSED: MIGraphX meets tolerance

     ✅ unet: PASSED: MIGraphX meets tolerance

     ✅ resnet50v1: PASSED: MIGraphX meets tolerance

     ✅ bert_base_cased_fp16: PASSED: MIGraphX meets tolerance

     ✅ bert_large_uncased_fp16: PASSED: MIGraphX meets tolerance

     ✅ bert_large: PASSED: MIGraphX meets tolerance

     ✅ yolov5s: PASSED: MIGraphX meets tolerance

     ✅ tinyllama: PASSED: MIGraphX meets tolerance

     ✅ vicuna-fastchat: PASSED: MIGraphX meets tolerance

     ✅ whisper-tiny-encoder: PASSED: MIGraphX meets tolerance

     ✅ whisper-tiny-decoder: PASSED: MIGraphX meets tolerance

     ✅ distilgpt2_fp16: PASSED: MIGraphX meets tolerance