ARM: dts: msm: add qrng for gvm on msm8996

Add device node qualcomm hardware random generator, so that to provide
real random number if qrng is enabled.
This is for security purpose for the application.

Change-Id: Ib359b39ec5c32cb05ed1e38c1ad377657e5c47ae
Signed-off-by: Parai Wang <fpwang@codeaurora.org>