Add links for i.mx rt related crate (imxrt-rs)

Author: teburd

README.md

@@ -176,6 +176,8 @@ Peripheral Access Crates were also called Device Crates.
 - [`lpc82x-pac`](https://crates.io/crates/lpc82x-pac) - ![crates.io](https://img.shields.io/crates/v/lpc82x-pac.svg)
 - [`lpc845-pac`](https://crates.io/crates/lpc485-pac) - ![crates.io](https://img.shields.io/crates/v/lpc845-pac.svg)
 - [`mkw41z`](https://crates.io/crates/mkw41z) - ![crates.io](https://img.shields.io/crates/v/mkw41z.svg)
+- [`imxrt-ral`](https://github.com/imxrt-rs/imxrt-rs) Register access layer for i.MX RT series. -  ![crates.io](https://img.shields.io/crates/v/imxrt-ral.svg)
+
 
 ### SiFive
 
@@ -275,6 +277,8 @@ Also check the list of [NXP board support crates][nxp-bsc]!
 - [`lpc55s6x-hal`](https://crates.io/crates/lpc55s6x-hal) - [![crates.io](https://img.shields.io/crates/v/lpc55s6x-hal.svg)](https://crates.io/crates/lpc55s6x-hal)
 - [`lpc8xx-hal`](https://crates.io/crates/lpc8xx-hal) - HAL for lpc82x and lpc845 - [![crates.io](https://img.shields.io/crates/v/lpc8xx-hal.svg)](https://crates.io/crates/lpc8xx-hal)
 - [`mkw41z-hal`](https://crates.io/crates/mkw41z-hal) - ![crates.io](https://img.shields.io/crates/v/mkw41z-hal.svg)
+- [`imxrt-hal`](https://github.com/imxrt-rs/imxrt-rs) - HAL for i.MX RT series. -  ![crates.io](https://img.shields.io/crates/v/imxrt-hal.svg)
+
 
 ### SiFive