[ARM] S3C: Fix scaler1 clock rate information

The pwm-scaler0 and pwm-scaler1 clocks have their
.id field set to -1 as they are not referenced to
any specific device. However, parts of the pwm-clock
code used the .id field to identify which scaler
clock was being used.

Fix the problem by comparing against the pointer to
the clock to identify the scalers.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

arch/arm/plat-s3c/pwm-clock.c

@@ -73,11 +73,13 @@
  * tclk -------------------------/
 */
 
+static struct clk clk_timer_scaler[];
+
 static unsigned long clk_pwm_scaler_get_rate(struct clk *clk)
 {
 	unsigned long tcfg0 = __raw_readl(S3C2410_TCFG0);
 
-	if (clk->id == 1) {
+	if (clk == &clk_timer_scaler[1]) {
 		tcfg0 &= S3C2410_TCFG_PRESCALER1_MASK;
 		tcfg0 >>= S3C2410_TCFG_PRESCALER1_SHIFT;
 	} else {
@@ -114,7 +116,7 @@ static int clk_pwm_scaler_set_rate(struct clk *clk, unsigned long rate)
 	local_irq_save(flags);
 	tcfg0 = __raw_readl(S3C2410_TCFG0);
 
-	if (clk->id == 1) {
+	if (clk == &clk_timer_scaler[1]) {
 		tcfg0 &= ~S3C2410_TCFG_PRESCALER1_MASK;
 		tcfg0 |= divisor << S3C2410_TCFG_PRESCALER1_SHIFT;
 	} else {