Use generic api to get the pwm clock frequency
Test with command "sf probe 1:0; time sf read 
40008000 0 1000".
Try with different numbers of bytes and see that sane values are obtained
Build and boot U-boot with this patch, backlight works properly.
Signed-off-by: Padmavathi Venna <padma.v@samsung.com>
Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
 unsigned long get_pwm_clk(void)
 {
        if (cpu_is_exynos5())
-               return exynos5_get_pwm_clk();
+               return clock_get_periph_rate(PERIPH_ID_PWM0);
        else {
                if (proid_is_exynos4412())
                        return exynos4x12_get_pwm_clk();