doc: add Supported Architectures

Author: phip1611

README.md

@@ -32,10 +32,6 @@ You can use the abstractions for example to:
 - create OS-specific loaders and leverage UEFI boot service
 - access UEFI runtime services from an OS
 
-All crates are compatible with all platforms that both the Rust compiler and
-UEFI support, such as `i686`, `x86_64`, and `aarch64`). Please note that we
-can't test all possible hardware/firmware/platform combinations.
-
 [UEFI]: https://en.wikipedia.org/wiki/Unified_Extensible_Firmware_Interface
 
 ![UEFI App running in QEMU](https://imgur.com/SFPSVuO.png)

uefi/src/lib.rs

@@ -45,6 +45,12 @@
 //! from your kernel. Hence, when you also use utilize `uefi` also in ELF
 //! binaries and are not limited to EFI images.
 //!
+//! ## Supported Architectures
+//!
+//! `uefi` is compatible with all platforms that both the Rust compiler and
+//! UEFI support, such as `i686`, `x86_64`, and `aarch64`. Please note that we
+//! can't test all possible hardware/firmware/platform combinations in CI.
+//!
 //! # Crate organisation
 //!
 //! The top-level module contains some of the most used types and macros,