Revert "pico-imx7d: enalbe 1.2GHz"

This reverts commit ae7c1d94e1d886525fc0ced61488095114779265.
(cherry picked from commit b3103703bf856559e33bb4038e8c0915bf972f1a)

Change-Id: I1e10cd3cc3a70a101abf2e3b7c393a433ffaf518
1 file changed