Add Doc Comment To CAPACITY const

Author: martinmortsell

hal/src/efc.rs

@@ -32,8 +32,10 @@ pub const BASE_ADDRESS: u32 = 0x00400000;
 ///The Capacity in bytes of the Flash Memory.
 #[cfg(feature = "flash-2M")]
 pub const CAPACITY: u32 = 0x00200000;
+///The Capacity in bytes of the Flash Memory.
 #[cfg(feature = "flash-1M")]
 pub const CAPACITY: u32 = 0x00100000;
+///The Capacity in bytes of the Flash Memory.
 #[cfg(feature = "flash-512K")]
 pub const CAPACITY: u32 = 0x00080000;
 /// The Size in bytes of a page in the Flash Memory.