ARM: dts: am33xx: Update DCAN nodes

Add "raminit-syscon" property to specify the RAMINIT register.
Add clock information.
Rename can nodes from "d_can" to "can" to be compliant
with the ePAPR specs.

Signed-off-by: Roger Quadros <rogerq@ti.com>
ARM: dts: am335x-evm: Add DCAN1 details

DCAN1 is routed to CAN port (J11) when Profile 1 is selected on the
profile selection switch.
Provide information for DCAN1 pins and node but keep it disabled
by default. User has to manually enable it if Profile 1 is chosen.

Signed-off-by: Roger Quadros <rogerq@ti.com>
HACK: ARM: DRA7: clockdomain: Fix DCAN1 RAMINT

Disable HW_AUTO for L4CFG and WKUPAON clockdomains.
Without this the DCAN1 RAMINIT.DONE bit never gets set after the
RAMINIT start sequence.

Signed-off-by: Roger Quadros <rogerq@ti.com>
ARM: dts: dra7-evm: Keep all VDD rails always-on

DRA7 Data Manual (SPRS857L - August 2014) section 4.1.1 states: "All
unused power supply balls must be supplied with the voltages specified
in the Section 5.2, Recommended Operating Conditions".

This implies that all unused voltage rails for Vayu can never be
switched off even if the hardware blocks inside that voltage domain is
unused. Switching off these unused rails may result in stability issues
on other domains and increased leakage and power-on-hour impacts.

J6eco-evm dts file already considers this, however j6evm-dts file needs
to be fixed to consider this constraint of the SoC.

Signed-off-by: Nishanth Menon <nm@ti.com>