ARM: dts: msm: Add qprng device tree data for msmferrum

Add random number generator device tree data to dtsi file by
adding msm-rng device node with all the necessary parameters,
to enable the prng driver on msmferrum.

Change-Id: Ie9f169ba2dddaf7cc0dae0b086f4e84bceb30952
Signed-off-by: AnilKumar Chimata <anilc@codeaurora.org>