cpufreq: amd-pstate: fix global sysfs attribute type

In commit 3666062b87ec ("cpufreq: amd-pstate: move to use bus_get_dev_root()")
the "amd_pstate" attributes where moved from a dedicated kobject to the
cpu root kobject.

While the dedicated kobject expects to contain kobj_attributes the root
kobject needs device_attributes.

As the changed arguments are not used by the callbacks it works most of
the time.
However CFI will detect this issue:

[ 4947.849350] CFI failure at dev_attr_show+0x24/0x60 (target: show_status+0x0/0x70; expected type: 0x8651b1de)
...
[ 4947.849409] Call Trace:
[ 4947.849410] <TASK>
[ 4947.849411] ? __warn+0xcf/0x1c0
[ 4947.849414] ? dev_attr_show+0x24/0x60
[ 4947.849415] ? report_cfi_failure+0x4e/0x60
[ 4947.849417] ? handle_cfi_failure+0x14c/0x1d0
[ 4947.849419] ? __cfi_show_status+0x10/0x10
[ 4947.849420] ? handle_bug+0x4f/0x90
[ 4947.849421] ? exc_invalid_op+0x1a/0x60
[ 4947.849422] ? asm_exc_invalid_op+0x1a/0x20
[ 4947.849424] ? __cfi_show_status+0x10/0x10
[ 4947.849425] ? dev_attr_show+0x24/0x60
[ 4947.849426] sysfs_kf_seq_show+0xa6/0x110
[ 4947.849433] seq_read_iter+0x16c/0x4b0
[ 4947.849436] vfs_read+0x272/0x2d0
[ 4947.849438] ksys_read+0x72/0xe0
[ 4947.849439] do_syscall_64+0x76/0xb0
[ 4947.849440] ? do_user_addr_fault+0x252/0x650
[ 4947.849442] ? exc_page_fault+0x7a/0x1b0
[ 4947.849443] entry_SYSCALL_64_after_hwframe+0x72/0xdc

Fixes: 3666062b87ec ("cpufreq: amd-pstate: move to use bus_get_dev_root()")
Reported-by: Jannik Glückert <[e-mail]>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=217765
Link: https://lore.kernel.org/lkml/[e-mail]/
Cc: All applicable <[e-mail]>
Signed-off-by: Thomas Weißschuh <[e-mail]>
Reviewed-by: Greg Kroah-Hartman <[e-mail]>
Reviewed-by: Nathan Chancellor <[e-mail]>
Signed-off-by: Rafael J. Wysocki <[e-mail]>

drivers/cpufreq/amd-pstate.c

···
 	return 0;
 }
 
-static ssize_t show_status(struct kobject *kobj,
-			   struct kobj_attribute *attr, char *buf)
+static ssize_t status_show(struct device *dev,
+			   struct device_attribute *attr, char *buf)
 {
 	ssize_t ret;
 
···
 	return ret;
 }
 
-static ssize_t store_status(struct kobject *a, struct kobj_attribute *b,
+static ssize_t status_store(struct device *a, struct device_attribute *b,
 			    const char *buf, size_t count)
 {
 	char *p = memchr(buf, '\n', count);
···
 cpufreq_freq_attr_ro(amd_pstate_highest_perf);
 cpufreq_freq_attr_rw(energy_performance_preference);
 cpufreq_freq_attr_ro(energy_performance_available_preferences);
-define_one_global_rw(status);
+static DEVICE_ATTR_RW(status);
 
 static struct freq_attr *amd_pstate_attr[] = {
 	&amd_pstate_max_freq,
···
 };
 
 static struct attribute *pstate_global_attributes[] = {
-	&status.attr,
+	&dev_attr_status.attr,
 	NULL
 };