mei: docs: add missing entries to kdoc in struct mei_cfg_idx

Document all entries in struct mei_cfg_idx.

Signed-off-by: Tomas Winkler <[e-mail]>
Reviewed-by: Randy Dunlap <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/misc/mei/hw-me.h

···
  * @MEI_ME_PCH12_SPS_CFG:  Platform Controller Hub Gen12 5.0 and newer
  *                         servers platforms with quirk for
  *                         SPS firmware exclusion.
+ * @MEI_ME_PCH12_SPS_ITOUCH_CFG: Platform Controller Hub Gen12
+ *                         client platforms (iTouch)
  * @MEI_ME_PCH15_CFG:      Platform Controller Hub Gen15 and newer
  * @MEI_ME_PCH15_SPS_CFG:  Platform Controller Hub Gen15 and newer
  *                         servers platforms with quirk for
  *                         SPS firmware exclusion.
+ * @MEI_ME_GSC_CFG:        Graphics System Controller
+ * @MEI_ME_GSCFI_CFG:      Graphics System Controller Firmware Interface
  * @MEI_ME_NUM_CFG:        Upper Sentinel.
  */
 enum mei_cfg_idx {