ggml-hexagon: fix rope failure at test-backend-ops

[chraac]

Changes

Fix rope op implementation, after these changes, the impl correctly handles the operation and passes all rope tests.

Before

[ROPE] NMSE = 1.881769338 > 0.000000100   ROPE(type=f32,ne_a=[128,32,2,1],n_dims=128,mode=0,n_ctx=512,fs=1.424500,ef=0.746500,af=1.000000,ff=0,v=0,inplace=0): �[1;31mFAIL�[0m
[ROPE] NMSE = 1.916275620 > 0.000000100   ROPE(type=f32,ne_a=[128,32,2,1],n_dims=128,mode=0,n_ctx=512,fs=1.424500,ef=0.746500,af=1.000000,ff=1,v=0,inplace=0): �[1;31mFAIL�[0m
[ROPE] NMSE = 1.883398782 > 0.000000100   ROPE(type=f32,ne_a=[128,32,2,1],n_dims=128,mode=0,n_ctx=512,fs=1.424500,ef=0.746500,af=1.424500,ff=0,v=0,inplace=0): �[1;31mFAIL�[0m
[ROPE] NMSE = 1.873313624 > 0.000000100   ROPE(type=f32,ne_a=[128,32,2,1],n_dims=128,mode=0,n_ctx=512,fs=1.424500,ef=0.746500,af=1.424500,ff=1,v=0,inplace=0): �[1;31mFAIL�[0m
[ROPE] NMSE = 1.924327319 > 0.000000100   ROPE(type=f32,ne_a=[128,32,2,1],n_dims=128,mode=0,n_ctx=512,fs=1.424500,ef=0.746500,af=1.424500,ff=0,v=0,inplace=1): �[1;31mFAIL�[0m
[ROPE] NMSE = 1.974410582 > 0.000000100   ROPE(type=f32,ne_a=[128,32,2,1],n_dims=128,mode=0,n_ctx=512,fs=1.424500,ef=0.746500,af=1.424500,ff=1,v=0,inplace=1): �[1;31mFAIL�[0m

After

  ROPE(type=f32,ne_a=[128,32,2,1],n_dims=128,mode=0,n_ctx=512,fs=1.424500,ef=0.746500,af=1.000000,ff=0,v=0,inplace=0): �[1;32mOK�[0m
  ROPE(type=f32,ne_a=[128,32,2,1],n_dims=128,mode=0,n_ctx=512,fs=1.424500,ef=0.746500,af=1.000000,ff=1,v=0,inplace=0): �[1;32mOK�[0m
  ROPE(type=f32,ne_a=[128,32,2,1],n_dims=128,mode=0,n_ctx=512,fs=1.424500,ef=0.746500,af=1.424500,ff=0,v=0,inplace=0): �[1;32mOK�[0m
  ROPE(type=f32,ne_a=[128,32,2,1],n_dims=128,mode=0,n_ctx=512,fs=1.424500,ef=0.746500,af=1.424500,ff=1,v=0,inplace=0): �[1;32mOK�[0m
  ROPE(type=f32,ne_a=[128,32,2,1],n_dims=128,mode=0,n_ctx=512,fs=1.424500,ef=0.746500,af=1.424500,ff=0,v=0,inplace=1): �[1;32mOK�[0m
  ROPE(type=f32,ne_a=[128,32,2,1],n_dims=128,mode=0,n_ctx=512,fs=1.424500,ef=0.746500,af=1.424500,ff=1,v=0,inplace=1): �[1;32mOK�[0m

[chraac]

QQ: did we have simd acceleration in the memcpy?