watchdog: s3c2410: remove unused freq_to_wdt and s3c2410wdt_is_running functions

clang with W=1 reports
drivers/watchdog/s3c2410_wdt.c:311:35: error: unused function
  'freq_to_wdt' [-Werror,-Wunused-function]
static inline struct s3c2410_wdt *freq_to_wdt(struct notifier_block *nb)
                                  ^
drivers/watchdog/s3c2410_wdt.c:446:19: error: unused function
  's3c2410wdt_is_running' [-Werror,-Wunused-function]
static inline int s3c2410wdt_is_running(struct s3c2410_wdt *wdt)
                  ^
These functions are not used, so remove them.

Signed-off-by: Tom Rix <trix@redhat.com>
Reviewed-by: Andi Shyti <andi.shyti@kernel.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20230321183439.1826823-1-trix@redhat.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

Author: Tom Rix

drivers/watchdog/s3c2410_wdt.c

@@ -308,11 +308,6 @@ static inline unsigned int s3c2410wdt_max_timeout(struct s3c2410_wdt *wdt)
 				       / S3C2410_WTCON_MAXDIV);
 }
 
-static inline struct s3c2410_wdt *freq_to_wdt(struct notifier_block *nb)
-{
-	return container_of(nb, struct s3c2410_wdt, freq_transition);
-}
-
 static int s3c2410wdt_disable_wdt_reset(struct s3c2410_wdt *wdt, bool mask)
 {
 	const u32 mask_val = BIT(wdt->drv_data->mask_bit);
@@ -443,11 +438,6 @@ static int s3c2410wdt_start(struct watchdog_device *wdd)
 	return 0;
 }
 
-static inline int s3c2410wdt_is_running(struct s3c2410_wdt *wdt)
-{
-	return readl(wdt->reg_base + S3C2410_WTCON) & S3C2410_WTCON_ENABLE;
-}
-
 static int s3c2410wdt_set_heartbeat(struct watchdog_device *wdd,
 				    unsigned int timeout)
 {