stm32f4: use new rcc_clock_setup_pll()

Batch replaced to use new api.  User code doesn't need this, but
examples should be up to date, and this avoids deprecation warnings.

examples/stm32/f4/stm32f429i-discovery/lcd-serial/clock.c

@@ -61,7 +61,7 @@ uint32_t mtime(void)
 void clock_setup(void)
 {
 	/* Base board frequency, set to 168Mhz */
-	rcc_clock_setup_hse_3v3(&rcc_hse_8mhz_3v3[RCC_CLOCK_3V3_168MHZ]);
+	rcc_clock_setup_pll(&rcc_hse_8mhz_3v3[RCC_CLOCK_3V3_168MHZ]);
 
 	/* clock rate / 168000 to get 1mS interrupt rate */
 	systick_set_reload(168000);