As per recent TRM, PBIAS cell on omap5 devices supports
3.3v and not 3.0v as documented earlier.

Update PBIAS regulator max voltage to match this.

Document reference:
SWPU249AF - OMAP543x Technical reference manual August 2016
Signed-off-by: Ravikumar Kattekola <rk@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>