ARM: dts: msm: remove invalid dsi pll supply entries for msm8996 v2

Commit f7fd823a ("ARM:
dts: msm: remove supply resources in DSI PLL for
8996") removes supply entries from dsi pll but did
not update the v2 dtsi. This causes the error when
dsi pll boots up for msm8996 v2 target.

Change-Id: If07df1ebc287fb96634e261d7aa4787c0ba1c802
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>