watchdog: cadence_wdt: Show information when driver is probed

Showing message that driver is loaded is common across drivers.
This change also fixes checkpatch (--strict) warning
"Alignment should match open parenthesis".

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>