doc update

README.md

@@ -29,7 +29,7 @@ The stack supports the following MCUs
 - **Nordic:** nRF52840, nRF52833
 - **NXP:** 
   - LPC Series: 11Uxx, 13xx, 175x_6x, 177x_8x, 18xx, 40xx, 43xx, 51Uxx, 54xxx, 55xx
-  - iMX RT Series: RT1052, RT1062, RT1064
+  - iMX RT Series: RT1021, RT1052, RT1062, RT1064
 - **Sony:** CXD56
 - **ST:** STM32 series: L0, F0, F1, F2, F3, F4, F7, H7 (device only)
 - **Tomu:** [valentyusb](https://github.com/im-tomu/valentyusb) (eptri)

docs/boards.md

@@ -28,7 +28,8 @@ This code base already had supported for a handful of following boards
 
 ### NXP iMX RT
 
-- [MIMX RT1052 Evaluation Kit](https://www.nxp.com/design/development-boards/i.mx-evaluation-and-development-boards/i.mx-rt1050-evaluation-kit:MIMXRT1050-EVK)
+- [MIMX RT1020 Evaluation Kit](https://www.nxp.com/design/development-boards/i.mx-evaluation-and-development-boards/i.mx-rt1020-evaluation-kit:MIMXRT1020-EVK)
+- [MIMX RT1050 Evaluation Kit](https://www.nxp.com/design/development-boards/i.mx-evaluation-and-development-boards/i.mx-rt1050-evaluation-kit:MIMXRT1050-EVK)
 - [MIMX RT1060 Evaluation Kit](https://www.nxp.com/design/development-boards/i.mx-evaluation-and-development-boards/mimxrt1060-evk-i.mx-rt1060-evaluation-kit:MIMXRT1060-EVK)
 - [MIMX RT1064 Evaluation Kit](https://www.nxp.com/design/development-boards/i.mx-evaluation-and-development-boards/mimxrt1064-evk-i.mx-rt1064-evaluation-kit:MIMXRT1064-EVK)