mfd: si476x-cmd: Repair wrongly described function argument 's/response/resp'

si476x_core_send_command()'s 5th argument has never been called response.

This change must have occurred prior to the driver being Mainlined.

We're also taking the opportunity to bring the first description back
into line, making my OCD happy!

This fixes the following W=1 warning(s):

 drivers/mfd/si476x-cmd.c:264: warning: Function parameter or member 'resp' not described in 'si476x_core_send_command
 drivers/mfd/si476x-cmd.c:264: warning: Excess function parameter 'response' description in 'si476x_core_send_command'

Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/si476x-cmd.c

@@ -241,13 +241,13 @@ static int si476x_core_parse_and_nag_about_error(struct si476x_core *core)
 /**
  * si476x_core_send_command() - sends a command to si476x and waits its
  * response
- * @core:    si476x_device structure for the device we are
+ * @core:     si476x_device structure for the device we are
  *            communicating with
  * @command:  command id
  * @args:     command arguments we are sending
  * @argn:     actual size of @args
- * @response: buffer to place the expected response from the device
- * @respn:    actual size of @response
+ * @resp:     buffer to place the expected response from the device
+ * @respn:    actual size of @resp
  * @usecs:    amount of time to wait before reading the response (in
  *            usecs)
  *