ARM: dts: msm: add MEM ACC regulators for cluster 0 and 1 on msm8994

Add mem-acc-regulator devices for msm8994 cluster 0 and
cluster 1.  Specify these as supplies for the APC0 and APC1
cpr-regulator devices, respectively.  This ensures that the
memory accelerator for each cluster can be properly controlled
when software switches between different APC0 and APC1 voltage
corners.

Change-Id: I4977cec3606e55acbf3333487eade3839617920e
Signed-off-by: David Collins <collinsd@codeaurora.org>