Remove builders from Config(s) and examples.

examples/stm32h7/src/bin/spi.rs

@@ -60,9 +60,7 @@ fn main() -> ! {
         Dbgmcu::enable_all();
     }
 
-    let p = embassy_stm32::init(
-        Config::default().rcc(rcc::Config::default().sys_ck(400.mhz()).pll1_q(100.mhz())),
-    );
+    let p = embassy_stm32::init( config() );
 
     let spi = spi::Spi::new(
         p.SPI3,
@@ -82,3 +80,16 @@ fn main() -> ! {
         unwrap!(spawner.spawn(main_task(spi)));
     })
 }
+
+fn config() -> Config {
+    let mut config = Config::default();
+    config.rcc = rcc_config();
+    config
+}
+
+fn rcc_config() -> rcc::Config {
+    let mut config = rcc::Config::default();
+    config.sys_ck = Some(400.mhz().into());
+    config.pll1.q_ck = Some( 100.mhz().into() );
+    config
+}