ACPI: platform-profile: Drop const qualifier for cur_profile

Drop the const qualifier from the static global cur_profile
pointer declaration.

This is a preparation patch for passing the cur_profile pointer as
parameter to the profile_get() and profile_set() callbacks so that
drivers dynamically allocating their driver-data struct, with their
platform_profile_handler struct embedded, can use this pointer to
get to their driver-data.

Note this also requires dropping the const from the pprof
platform_profile_register() function argument. Dropping this
const is not a problem, non of the queued up consumers of
platform_profile_register() actually pass in a const pointer.

Link: https://lore.kernel.org/linux-acpi/5e7a4d87-52ef-e487-9cc2-8e7094beaa08@redhat.com/
Link: https://lore.kernel.org/r/20210114073429.176462-2-jiaxun.yang@flygoat.comSuggested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
[ hdegoede@redhat.com: Also remove const from platform_profile_register() ]
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/platform_profile.c

@@ -9,7 +9,7 @@
 #include <linux/platform_profile.h>
 #include <linux/sysfs.h>
 
-static const struct platform_profile_handler *cur_profile;
+static struct platform_profile_handler *cur_profile;
 static DEFINE_MUTEX(profile_lock);
 
 static const char * const profile_names[] = {
@@ -132,7 +132,7 @@ void platform_profile_notify(void)
 }
 EXPORT_SYMBOL_GPL(platform_profile_notify);
 
-int platform_profile_register(const struct platform_profile_handler *pprof)
+int platform_profile_register(struct platform_profile_handler *pprof)
 {
 	int err;
 

include/linux/platform_profile.h

@@ -32,7 +32,7 @@ struct platform_profile_handler {
 	int (*profile_set)(enum platform_profile_option profile);
 };
 
-int platform_profile_register(const struct platform_profile_handler *pprof);
+int platform_profile_register(struct platform_profile_handler *pprof);
 int platform_profile_remove(void);
 void platform_profile_notify(void);