dt-bindings: phy-qcom-qmp: Tweak qcom,msm8998-qmp-ufs-phy

Fixup MSM8998 UFS binding now that Evan's reset series has landed.
https://lore.kernel.org/lkml/20190321171800.104681-1-evgreen@chromium.org/



Signed-off-by: Marc Gonzalez <marc.w.gonzalez@free.fr>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>