Move the use inside the macro call, inside another set of braces in case it percolates up twice.

embassy-stm32/src/dma/dmamux.rs

@@ -47,17 +47,18 @@ pac::dma_channels! {
     };
 }
 
-use crate::rcc::sealed::RccPeripheral;
-
 /// safety: must be called only once
 pub(crate) unsafe fn init() {
     pac::peripherals! {
         (dmamux, $peri:ident) => {
+            {
                 pac::peripheral_rcc! {
                     ($peri, $clock:ident, $en_reg:ident, $rst_reg:ident, $en_fn:ident, $rst_fn:ident) => {
+                        use crate::rcc::sealed::RccPeripheral;
                         crate::peripherals::$peri::enable()
                     };
                 }
+            }
         };
     }
 }