[mcu_periph] set ADC_RESOLUTION in arch headers

sw/airborne/arch/lpc21/mcu_periph/adc_arch.h

@@ -32,6 +32,11 @@
 
 #include BOARD_CONFIG
 
+/* Set the correct ADC resolution */
+#ifndef ADC_RESOLUTION
+#define ADC_RESOLUTION 1024
+#endif
+
 /** 8 ADCs for bank 0, others for bank 2 */
 #define NB_ADC 8
 

sw/airborne/arch/stm32/mcu_periph/adc_arch.h

@@ -32,6 +32,11 @@
 
 #include BOARD_CONFIG
 
+/* Set the correct ADC resolution */
+#ifndef ADC_RESOLUTION
+#define ADC_RESOLUTION 4096
+#endif
+
 enum adc1_channels {
 #ifdef AD1_1_CHANNEL
   AD1_1,

sw/airborne/mcu_periph/adc.h

@@ -45,15 +45,6 @@
  microcontroller architecture.
 */
 
-/* Set the correct ADC resolution */
-#ifndef ADC_RESOLUTION
-#if defined(STM32F1) || defined(STM32F4)
-#define ADC_RESOLUTION 4096
-#else
-#define ADC_RESOLUTION 1024
-#endif
-#endif
-
 /**
     Struct to collect samples from ADC and building an average
     over MAX_AV_NB_SAMPLE values.