add ra4m1_ek board

docs/reference/supported.rst

@@ -297,8 +297,17 @@ LPC55
 -  `LPCXpresso 55s69 EVK <https://www.nxp.com/design/development-boards/lpcxpresso-boards/lpcxpresso55s69-development-board:LPC55S69-EVK>`__
 -  `MCU-Link <https://www.nxp.com/design/development-boards/lpcxpresso-boards/mcu-link-debug-probe:MCU-LINK>`__
 
-Renesas RX
-----------
+Renesas
+-------
+
+RA
+^^
+
+-  `Evaluation Kit for RA4M1 <https://www.renesas.com/us/en/products/microcontrollers-microprocessors/ra-cortex-m-mcus/ek-ra4m1-evaluation-kit-ra4m1-mcu-group>`__
+-  `Evaluation Kit for RA4M3 <https://www.renesas.com/us/en/products/microcontrollers-microprocessors/ra-cortex-m-mcus/ek-ra4m3-evaluation-kit-ra4m3-mcu-group>`__
+
+RX
+^^
 
 -  `GR-CITRUS <https://www.renesas.com/us/en/products/gadget-renesas/boards/gr-citrus>`__
 -  `Renesas RX65N Target Board <https://www.renesas.com/us/en/products/microcontrollers-microprocessors/rx-32-bit-performance-efficiency-mcus/rtk5rx65n0c00000br-target-board-rx65n>`__