greybus: kernel_ver.h: add a blank line after a variable definition

checkpatch reminds us that a blank line should go after a variable
definition, so fix it up here.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>

drivers/staging/greybus/kernel_ver.h

@@ -69,6 +69,7 @@ static inline void gb_gpiochip_remove(struct gpio_chip *chip)
 static inline void gb_gpiochip_remove(struct gpio_chip *chip)
 {
 	int ret;
+
 	ret = gpiochip_remove(chip);
 }
 #endif