ipq806x: gcc: Added the enable regs and mask for PRNG

Kernel got hanged while reading from /dev/hwrng at the
time of PRNG clock enable

Fixes: 24d8fba4 "clk: qcom: Add support for IPQ8064's global clock controller (GCC)"
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Link: https://lkml.kernel.org/r/20200318131657.345-1-ansuelsmth@gmail.com


Signed-off-by: Stephen Boyd <sboyd@kernel.org>