ARM: dts: msm: Use LLCC as the bus-master for venus ddr

LLCC is a immediate master of venus ddr. With this, the
BW vote is correctly split between MMNOC and LLCC.

CRs-Fixed: 2363238
Change-Id: Ib7f9042156d8f03bcdbf2bfb7c8cca52a0226543
Signed-off-by: Chinmay Sawarkar <chinmays@codeaurora.org>
Signed-off-by: Niranjan Reddy Dumbala <dnreddy@codeaurora.org>