watchdog: sp805: Fix documentation style comment

@ was missing before variables names, in their description. Also adev is
mentioned as dev in comment. Fix both these issues.
Signed-off-by: NViresh Kumar <viresh.kumar@st.com>
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

drivers/watchdog/sp805_wdt.c

@@ -56,14 +56,13 @@
 
 /**
  * struct sp805_wdt: sp805 wdt device structure
- *
- * lock: spin lock protecting dev structure and io access
- * base: base address of wdt
- * clk: clock structure of wdt
- * dev: amba device structure of wdt
- * status: current status of wdt
- * load_val: load value to be set for current timeout
- * timeout: current programmed timeout
+ * @lock: spin lock protecting dev structure and io access
+ * @base: base address of wdt
+ * @clk: clock structure of wdt
+ * @adev: amba device structure of wdt
+ * @status: current status of wdt
+ * @load_val: load value to be set for current timeout
+ * @timeout: current programmed timeout
  */
 struct sp805_wdt {
 	spinlock_t			lock;