ARM: dts: OMAP4430: add device node for AVS

Patch adds AVS device node definition for MPU voltagedomain.
Current DTB entry contains data to make SmartReflex working
as class 3.0 - continuous calibration, HW loop.

Signed-off-by: Andrii Tseglytskyi <andrii.tseglytskyi@ti.com>
TEST ONLY: PM / AVS: force calibration on boot on OPP_NOM

Patch is added to verify first time calibration,
which occurs immediately after SmartReflex driver probe.

Signed-off-by: Andrii Tseglytskyi <andrii.tseglytskyi@ti.com>
ARM: dts: OMAP4430: modify smartreflex_mpu device node for class 1.5

Patch adds needed data to make Smartreflex driver working as
class 1.5 - periodic calibration, HW loop

Signed-off-by: Andrii Tseglytskyi <andrii.tseglytskyi@ti.com>