MLK-23196 imx8mp_evk: Increase VDD_ARM to 0.95v Overdrive voltage

MLK-23196 imx8mp_evk: Increase VDD_ARM to 0.95v Overdrive voltage

There is a frequency/timing limitation for SOC and ARM, if SOC is OD voltage/OD freq,
then ARM can't run at ND voltage/1.2Ghz, it may have timing risk from SOC to ARM.

Current VDD_SOC is set to 0.95v OD voltage in SPL, and kernel will increase bus
clocks to OD frequency before it increases ARM voltage. So to conform to the
limitation, we'd better increases VDD_ARM to OD voltage in SPL.

Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Anson Huang <Anson.Huang@nxp.com>
(cherry picked from commit f9fdb7a6134d8929c2291303c006f7380d97faa8)
(cherry picked from commit 543a0f1fdc2009fb24436b14a0488408c2f8341f)