ARM: dts: msm: Remove A53 clock phandle and id for MSM8994v2

Due to glitches in clock divider, mux hardware the pll management of the
A53 Veyron PLL needs to be moved to the RPM. Remove all A53 clk references
so that the drivers do not attempt to manage the clock and so the pll from
the linux software.

Change-Id: I4aad79f8b96d03507e3fedb92724cef72c205ab5
Signed-off-by: Karthik Parsha <kparsha@codeaurora.org>