scsi: pm8001: Fix kernel-doc warnings

Fix the following kernel-doc warnings:

drivers/scsi/pm8001/pm8001_ctl.c:900: warning: cannot understand function prototype: 'const char *const mpiStateText[] = '
drivers/scsi/pm8001/pm8001_ctl.c:930: warning: Function parameter or member 'attr' not described in 'ctl_hmi_error_show'
drivers/scsi/pm8001/pm8001_ctl.c:951: warning: Function parameter or member 'attr' not described in 'ctl_raae_count_show'
drivers/scsi/pm8001/pm8001_ctl.c:972: warning: Function parameter or member 'attr' not described in 'ctl_iop0_count_show'
drivers/scsi/pm8001/pm8001_ctl.c:993: warning: Function parameter or member 'attr' not described in 'ctl_iop1_count_show'

Link: https://lore.kernel.org/r/[e-mail]
Fixes: 4ddbea1b6f51 ("scsi: pm80xx: Add sysfs attribute to check MPI state")
Acked-by: Jack Wang <[e-mail]>
Signed-off-by: Bart Van Assche <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/pm8001/pm8001_ctl.c

···
 static DEVICE_ATTR(update_fw, S_IRUGO|S_IWUSR|S_IWGRP,
 	pm8001_show_update_fw, pm8001_store_update_fw);
 
-/**
- * ctl_mpi_state_show - controller MPI state check
- * @cdev: pointer to embedded class device
- * @buf: the buffer returned
- *
- * A sysfs 'read-only' shost attribute.
- */
-
 static const char *const mpiStateText[] = {
 	"MPI is not initialized",
 	"MPI is successfully initialized",
···
 	"MPI initialization failed with error in [31:16]"
 };
 
+/**
+ * ctl_mpi_state_show - controller MPI state check
+ * @cdev: pointer to embedded class device
+ * @attr: device attribute (unused)
+ * @buf: the buffer returned
+ *
+ * A sysfs 'read-only' shost attribute.
+ */
 static ssize_t ctl_mpi_state_show(struct device *cdev,
 		struct device_attribute *attr, char *buf)
 {
···
 /**
  * ctl_hmi_error_show - controller MPI initialization fails
  * @cdev: pointer to embedded class device
+ * @attr: device attribute (unused)
  * @buf: the buffer returned
  *
  * A sysfs 'read-only' shost attribute.
  */
-
 static ssize_t ctl_hmi_error_show(struct device *cdev,
 		struct device_attribute *attr, char *buf)
 {
···
 /**
  * ctl_raae_count_show - controller raae count check
  * @cdev: pointer to embedded class device
+ * @attr: device attribute (unused)
  * @buf: the buffer returned
  *
  * A sysfs 'read-only' shost attribute.
  */
-
 static ssize_t ctl_raae_count_show(struct device *cdev,
 		struct device_attribute *attr, char *buf)
 {
···
 /**
  * ctl_iop0_count_show - controller iop0 count check
  * @cdev: pointer to embedded class device
+ * @attr: device attribute (unused)
  * @buf: the buffer returned
  *
  * A sysfs 'read-only' shost attribute.
  */
-
 static ssize_t ctl_iop0_count_show(struct device *cdev,
 		struct device_attribute *attr, char *buf)
 {
···
 /**
  * ctl_iop1_count_show - controller iop1 count check
  * @cdev: pointer to embedded class device
+ * @attr: device attribute (unused)
  * @buf: the buffer returned
  *
  * A sysfs 'read-only' shost attribute.
  */
-
 static ssize_t ctl_iop1_count_show(struct device *cdev,
 		struct device_attribute *attr, char *buf)
 {