change ADC_MULTIPLIER to better reflect battery voltage

Author: tpp-at-idx

variants/thinknode_m2/variant.h

@@ -1,15 +1,12 @@
 #define I2C_SCL 15
 #define I2C_SDA 16
-#define  PIN_VBAT_READ    17
+#define PIN_VBAT_READ    17
 #define AREF_VOLTAGE            (3.0)
-#define ADC_MULTIPLIER (1.548F)
+#define ADC_MULTIPLIER (1.509F)
 #define PIN_BUZZER 5
 #define PIN_VEXT_EN_ACTIVE HIGH
 #define PIN_VEXT_EN 46
 #define PIN_USER_BTN 47
 #define PIN_LED 6
 #define PIN_STATUS_LED 6
 #define PIN_PWRBTN 4
-
-
-