embassy-rp: Add multicore support

embassy-rp/src/lib.rs

@@ -5,6 +5,7 @@
 // This mod MUST go first, so that the others see its macros.
 pub(crate) mod fmt;
 
+mod critical_section_impl;
 mod intrinsics;
 
 pub mod adc;
@@ -23,6 +24,7 @@ pub mod usb;
 
 pub mod clocks;
 pub mod flash;
+pub mod multicore;
 mod reset;
 
 // Reexports