Add tracing points for sdio transfers, just dump the address, flags and the
buffer.
Signed-off-by: NKalle Valo <kvalo@qca.qualcomm.com>

Add basic tracing infrastructure support to ath6kl and which can be
enabled with CONFIG_ATH6KL_TRACING.
Signed-off-by: NKalle Valo <kvalo@qca.qualcomm.com>