watchdog: sp805_wdt: Drop documentation of non-existent `status` member

Remove the documentation for the `status` field in the `sp805_wdt`
structure, as the field does not exist.

Signed-off-by: Lad Prabhakar <[e-mail]>
Reviewed-by: Guenter Roeck <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Guenter Roeck <[e-mail]>
Signed-off-by: Wim Van Sebroeck <[e-mail]>

drivers/watchdog/sp805_wdt.c

···
  * @clk: (optional) clock structure of wdt
  * @rate: (optional) clock rate when provided via properties
  * @adev: amba device structure of wdt
- * @status: current status of wdt
  * @load_val: load value to be set for current timeout
  */
 struct sp805_wdt {