MIPS: BMIPS: Add SATA/PHY nodes for bcm7425

MIPS: BMIPS: Add SATA/PHY nodes for bcm7425

Add AHCI and PHY device nodes to MIPS-based BCM7425 set-top box
platform.

Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Kevin Cernekee <cernekee@gmail.com>
Cc: Dragan Stancevic <dragan.stancevic@gmail.com>
Cc: linux-ide@vger.kernel.org
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/11377/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>