Add OPT_MCU_SAME70 option value.
#define OPT_MCU_SAME5X 203 ///< MicroChip SAM E5x
#define OPT_MCU_SAMD11 204 ///< MicroChip SAMD11
#define OPT_MCU_SAML22 205 ///< MicroChip SAML22
+#define OPT_MCU_SAME70 206 ///< MicroChip SAME70 series
// STM32
#define OPT_MCU_STM32F0 300 ///< ST STM32F0
