Function std::rocm_concat_channels
int rocm_concat_channels(
struct RocmBuf a,
unsigned long aChannels,
struct RocmBuf c,
unsigned long cChannels,
struct RocmBuf out,
unsigned long batch,
unsigned long plane,
)out[b] = (a[b], c[b]) along channels, for each of 'batch' images whose planes are 'plane' = height*width elements (concat_channels).