cacheinfo: rename of_node to fw_token

Rename and change the type of of_node to indicate
it is a generic pointer which is generally only used
for comparison purposes. In a later patch we will put
an ACPI/PPTT token pointer in fw_token so that
the code which builds the shared cpu masks can be reused.

Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Vijaya Kumar K <vkilari@codeaurora.org>
Tested-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Tested-by: Tomasz Nowicki <Tomasz.Nowicki@cavium.com>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

include/linux/cacheinfo.h

@@ -34,9 +34,8 @@ enum cache_type {
  * @shared_cpu_map: logical cpumask representing all the cpus sharing
  *	this cache node
  * @attributes: bitfield representing various cache attributes
- * @of_node: if devicetree is used, this represents either the cpu node in
- *	case there's no explicit cache node or the cache node itself in the
- *	device tree
+ * @fw_token: Unique value used to determine if different cacheinfo
+ *	structures represent a single hardware cache instance.
  * @disable_sysfs: indicates whether this node is visible to the user via
  *	sysfs or not
  * @priv: pointer to any private data structure specific to particular
@@ -65,8 +64,7 @@ struct cacheinfo {
 #define CACHE_ALLOCATE_POLICY_MASK	\
 	(CACHE_READ_ALLOCATE | CACHE_WRITE_ALLOCATE)
 #define CACHE_ID		BIT(4)
-
-	struct device_node *of_node;
+	void *fw_token;
 	bool disable_sysfs;
 	void *priv;
 };