Add support for RA6M4

src/drivers/ra.h

@@ -0,0 +1,8 @@
+#pragma once
+
+struct mg_tcpip_driver_ra_data {
+  // MDC clock "divider". MDC clock is software generated,
+  uint32_t clock;    // core clock frequency in Hz
+  uint16_t irqno;    // IRQn, R_ICU->IELSR[irqno]
+  uint8_t phy_addr;  // PHY address
+};