arm64: dts/sdm845: Enable FW implemented safe sequence handler on MTP

Indicate on MTP SDM845 that firmware implements handler to
TLB invalidate erratum SCM call where SAFE sequence is toggled
to achieve optimum performance on real-time clients, such as
display and camera.

Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Ondrej Kubik <ondrej.kubik@canonical.com>