ARM: dts: msm: Update gpu bw level for SVS_L1

For SVS_L1 power level, open bus levels 8 and 9 to reduce high current
consumption of GPU and APPS rail.

Change-Id: I87a78011480731a6b4c973ecfda7df74e36c40d3
Signed-off-by: Mohammed Mirza Mandayappurath Manzoor <mmandaya@codeaurora.org>