MLK-16450-1: ASoC: fsl_hifi4: fix crash issue caused by memcpy()

MLK-16450-1: ASoC: fsl_hifi4: fix crash issue caused by memcpy()

When loop testing the hifi4 dirver, a random crash issue always
occur when doing memcpy() in decode function.
Have found that memcpy() is not suited to transfer data between
kernel space and user space, so use copy_from_user() and copy_
to_user() function to replace memcpy() to fix this issue.

Signed-off-by: Weiguang Kong <weiguang.kong@nxp.com>