ARM: dts: msm: update USB2 emu phy init sequence

On some RUMI units it is seen that the PHY is not correctly
running at 60MHz UTMI clock frequency. Add additional reset
assertion in the beginning of the sequence which helps to
properly bring the PHY to the correct state.

Change-Id: I11dacbffd3693fa5832e90b782f277cd9fb3fd27
Signed-off-by: Jack Pham <jackp@codeaurora.org>