power/reset: brcmstb: Add support for old 65nm chips

The register bit fields are a little different, so add an entry and a
compatible string to accommodate them.

Signed-off-by: Kevin Cernekee <[e-mail]>
Signed-off-by: Sebastian Reichel <[e-mail]>

Documentation/devicetree/bindings/arm/brcm-brcmstb.txt

···
 Required properties
 
     - compatible
-        The string property "brcm,brcmstb-reboot".
+        The string property "brcm,brcmstb-reboot" for 40nm/28nm chips with
+        the new SYS_CTRL interface, or "brcm,bcm7038-reboot" for 65nm
+        chips with the old SUN_TOP_CTRL interface.
 
     - syscon
         A phandle / integer array that points to the syscon node which describes

drivers/power/reset/brcmstb-reboot.c

···
 	.sw_mstr_rst_mask = BIT(0),
 };
 
+static const struct reset_reg_mask reset_bits_65nm = {
+	.rst_src_en_mask = BIT(3),
+	.sw_mstr_rst_mask = BIT(31),
+};
+
 static const struct of_device_id of_match[] = {
 	{ .compatible = "brcm,brcmstb-reboot", .data = &reset_bits_40nm },
+	{ .compatible = "brcm,bcm7038-reboot", .data = &reset_bits_65nm },
 	{},
 };