ath10k: use local memory instead of shadow descriptor in ce_send
Currently to avoid uncached memory access while filling up copy engine descriptors, shadow descriptors are used. This can be optimized further by removing shadow descriptors. To achieve that first shadow ring dependency in ce_send is removed by creating local copy of the descriptor on stack and make a one-shot copy into the "uncached" descriptor. Signed-off-by: NRajkumar Manoharan <rmanohar@qti.qualcomm.com> Signed-off-by: NKalle Valo <kvalo@qca.qualcomm.com>
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