ARM: dts: msm: add lanes-per-direction for UFS PHYs on SDM845

SDM845 have 2 UFS PHY instances, one instance supports 2-lane while other
instance supports only 1-lane. Add DT attribute "lanes-per-direction"
to differentiate between 1-lane and 2-lane PHY.

Change-Id: Iee2c5797ebc3cab801c717b7a258f5c2e965c12f
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>