ata: ahci_brcmstb: add support for MIPS-based platforms

The BCM7xxx ARM-based and MIPS-based platforms share a similar hardware
block for AHCI SATA3.

This new compatible string, "brcm,bcm7425-ahci", may be used for most
MIPS-based platforms of 40nm process technology.

Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

Documentation/devicetree/bindings/ata/brcm,sata-brcmstb.txt

@@ -4,7 +4,9 @@ SATA nodes are defined to describe on-chip Serial ATA controllers.
 Each SATA controller should have its own node.
 
 Required properties:
-- compatible         : compatible list, may contain "brcm,bcm7445-ahci" and/or
+- compatible         : should be one or more of
+                       "brcm,bcm7425-ahci"
+                       "brcm,bcm7445-ahci"
                        "brcm,sata3-ahci"
 - reg                : register mappings for AHCI and SATA_TOP_CTRL
 - reg-names          : "ahci" and "top-ctrl"

drivers/ata/Kconfig

@@ -100,7 +100,7 @@ config SATA_AHCI_PLATFORM
 
 config AHCI_BRCMSTB
 	tristate "Broadcom STB AHCI SATA support"
-	depends on ARCH_BRCMSTB
+	depends on ARCH_BRCMSTB || BMIPS_GENERIC
 	help
 	  This option enables support for the AHCI SATA3 controller found on
 	  STB SoC's.

drivers/ata/ahci_brcmstb.c

@@ -318,6 +318,7 @@ static int brcm_ahci_remove(struct platform_device *pdev)
 }
 
 static const struct of_device_id ahci_of_match[] = {
+	{.compatible = "brcm,bcm7425-ahci"},
 	{.compatible = "brcm,bcm7445-ahci"},
 	{},
 };