260: add board specific chconf

Author: dexter93

platforms/chibios/boards/SN_SN32F260/configs/chconf.h

@@ -48,6 +48,16 @@
 #define CH_CFG_IDLE_LEAVE_HOOK() {                                          \
     SN_PMU->CTRL = 0;                                                       \
 }
+#define PORT_IDLE_THREAD_STACK_SIZE     0
+#define PORT_INT_REQUIRED_STACK         0
+#define RAW_IN_CAPACITY                 1
+#define RAW_OUT_CAPACITY                1
+
+/* can't call sleep without the idle thread, must override related functions */
+#if CH_CFG_NO_IDLE_THREAD == TRUE
+        #pragma weak chThdSleep
+        #pragma weak chThdSuspendTimeoutS
+#endif
 
 #include_next <chconf.h>