hwrng: Add QRNG driver snapshot for kona

This is a snapshot of the qrng driver as of msm-4.19
commit e74173d56eb2c869 ("hwrng: Add QRNG driver
snapshot for kona") with changes to comply with
msm-5.4 format requirement.

Change-Id: I930b0dfd70db8b2c1ffcb98965aabe45bffbd0ba
Signed-off-by: Zhen Kong <zkong@codeaurora.org>