making TX period available since downstream wants to multiply it by two (#302)

Co-authored-by: rusefillc <sdfsdfqsf2334234234>

firmware/can.cpp

@@ -25,7 +25,7 @@ void CanTxThread(void*)
             SendCanForChannel(ch);
         }
 
-        chThdSleepMilliseconds(10);
+        chThdSleepMilliseconds(WBO_TX_PERIOD_MS);
     }
 }
 

for_rusefi/wideband_can.h

@@ -26,6 +26,9 @@
 #define WB_MGS_ECU_STATUS 0xEF5'0000
 #define WB_DATA_BASE_ADDR 0x190
 
+// we transmit every 10ms
+#define WBO_TX_PERIOD_MS 10
+
 namespace wbo
 {
 enum class Fault : uint8_t