UPSTREAM: ath10k: qmi: Sleep for a while before assigning MSA memory

commit b70b3a36ec33a2c8d3292f3b33fe2047a8f57b9a upstream.

Unless we sleep for a while before transitioning the MSA memory to WLAN
the MPSS.AT.4.0.c2-01184-SDM845_GEN_PACK-1 firmware triggers a security
violation fairly reliably. Unforutnately recovering from this failure
always results in the entire system freezing.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
(cherry picked from commit b70b3a36ec33a2c8d3292f3b33fe2047a8f57b9a)
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Change-Id: Ie44e86d404f1897b7cc349a03972178374fef89c