RVV Kernel in muriscv_nn_vec_mat_mult_t_s8 does not support address_offset != 1

[PhilippvK]

This causes the SVDF unit tests to fail on RVV.

Problematic kernel:

muriscv-nn/Source/NNSupportFunctions/muriscv_nn_vec_mat_mult_t_s8.c

Line 62 in 67c33ea

const int32_t address_offset,

The kernels would need to do a scattered store, see https://github.com/ARM-software/CMSIS-NN/blob/main/Source/NNSupportFunctions/arm_nn_vec_mat_mult_t_s8.c for reference.

As a workaround, I will just comment out the RVV part in the svdf_s8.