arm: dts: msm: Remove pmic revid of pmic for sdm450+pmi632

Currently revid of pmic is present in dts file but
if next revision of pmic is updated hardware will
fail to pick the correct dtb blob as the dt will
have older revid value than hardware. Remove the
revid to fix this issue.

Change-Id: Ia6643fd34352e73860d73c1edbd6c3f12ade8629
Signed-off-by: Kavya Nunna <knunna@codeaurora.org>