usb: chipidea: otg: Fix kerneldoc issues relating to description of 'ci'

Firstly we add some missing descriptions.  Then we fix some formatting
issues.  Kerneldoc expects arguments to be in the format '@.*: '.  If
either the '@' or ':' is omitted, kerneldoc gets confused.

Fixes the following W=1 kernel build warning(s):

 drivers/usb/chipidea/otg.c:29: warning: Function parameter or member 'ci' not described in 'hw_read_otgsc'
 drivers/usb/chipidea/otg.c:82: warning: Function parameter or member 'ci' not described in 'hw_write_otgsc'
 drivers/usb/chipidea/otg.c:235: warning: Function parameter or member 'ci' not described in 'ci_hdrc_otg_init'
 drivers/usb/chipidea/otg.c:254: warning: Function parameter or member 'ci' not described in 'ci_hdrc_otg_destroy'

Cc: Peter Chen <Peter.Chen@nxp.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20200703174148.2749969-10-lee.jones@linaro.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/chipidea/otg.c

@@ -23,6 +23,7 @@
 
 /**
  * hw_read_otgsc returns otgsc register bits value.
+ * @ci: the controller
  * @mask: bitfield mask
  */
 u32 hw_read_otgsc(struct ci_hdrc *ci, u32 mask)
@@ -75,6 +76,7 @@ u32 hw_read_otgsc(struct ci_hdrc *ci, u32 mask)
 
 /**
  * hw_write_otgsc updates target bits of OTGSC register.
+ * @ci: the controller
  * @mask: bitfield mask
  * @data: to be written
  */
@@ -229,7 +231,7 @@ static void ci_otg_work(struct work_struct *work)
 
 /**
  * ci_hdrc_otg_init - initialize otg struct
- * ci: the controller
+ * @ci: the controller
  */
 int ci_hdrc_otg_init(struct ci_hdrc *ci)
 {
@@ -248,7 +250,7 @@ int ci_hdrc_otg_init(struct ci_hdrc *ci)
 
 /**
  * ci_hdrc_otg_destroy - destroy otg struct
- * ci: the controller
+ * @ci: the controller
  */
 void ci_hdrc_otg_destroy(struct ci_hdrc *ci)
 {