soc: qcom: rpmh: Allow RPMH on ARM SoC

Remove config restriction for RPMH on ARM64 platforms only.

Signed-off-by: Lina Iyer <ilina@codeaurora.org>
Link: https://lore.kernel.org/r/1590750158-20661-1-git-send-email-mkshah@codeaurora.org


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>