fix warnings

Author: dotcypress

src/analog/adc.rs

@@ -216,7 +216,7 @@ impl Adc {
     }
 
     pub fn oversamling_enable(&mut self) {
-        self.rb.cfgr2.modify(|_, w| unsafe { w.ovse().set_bit() });
+        self.rb.cfgr2.modify(|_, w| { w.ovse().set_bit() });
     }
 
     pub fn start_injected(&mut self) {

src/timer/pwm.rs

@@ -71,6 +71,7 @@ macro_rules! pwm {
     }
 }
 
+#[cfg(feature = "stm32g0x1")]
 macro_rules! pwm_hal {
     ($($TIMX:ident:
         ($CH:ty, $ccxe:ident, $ccmrx_output:ident, $ocxpe:ident, $ocxm:ident, $ccrx:ident, $ccrx_l:ident, $ccrx_h:ident),)+