In case ldo-bypass mode, we will use 'pureg_dummy' in stead of 'vddpu'.The
voltage setting is 0x1f(ldo-mode) and the non-zero value means 'vddpu' enabled
status. Regulator common framwork will turn off the unused regulator which keep
enabled status. That will set the PU mode from ldo-bypass to power off, and may make
gpu/vpu driver hang etc. You can also see the below abnormal message during boot:
[ 3.000182] VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4
[ 3.010577] VGEN3: disabling
[ 3.015116] VGEN2: disabling
[ 3.019659] VGEN1: disabling
[ 3.023598] vddpu: disabling
Signed-off-by: Robin Gong <b38343@freescale.com>
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