tests/driver_mq3: adapted to ADC driver changes

tests/driver_mq3/Makefile

@@ -7,11 +7,9 @@ USEMODULE += mq3
 USEMODULE += xtimer
 
 # set default device parameters in case they are undefined
-MQ3_ADC  ?= ADC_0
-MQ3_CHAN ?= 0
+MQ3_ADC_LINE  ?= ADC_LINE\(0\)
 
 # export parameters
-CFLAGS += -DMQ3_ADC=$(MQ3_ADC)
-CFLAGS += -DMQ3_CHAN=$(MQ3_CHAN)
+CFLAGS += -DMQ3_ADC_LINE=$(MQ3_ADC_LINE)
 
 include $(RIOTBASE)/Makefile.include

tests/driver_mq3/main.c

@@ -25,11 +25,8 @@
 #include "periph_conf.h"
 #include "periph/adc.h"
 
-#ifndef MQ3_ADC
-#error "MQ3_ADC is not specified"
-#endif
-#ifndef MQ3_CHAN
-#error "MQ3_CHAN is not specified"
+#ifndef MQ3_ADC_LINE
+#error "MQ3_ADC_LINE is not specified"
 #endif
 
 int main(void)
@@ -38,8 +35,8 @@ int main(void)
     int res;
 
     puts("MQ-3 alcohol sensor test application\n");
-    printf("Initializing MQ-3 sensor at ADC_%i, channel %i...    ", MQ3_ADC, MQ3_CHAN);
-    res = mq3_init(&dev, MQ3_ADC, MQ3_CHAN);
+    printf("Initializing MQ-3 sensor at ADC_LINE(%i)...   ", (int)MQ3_ADC_LINE);
+    res = mq3_init(&dev, MQ3_ADC_LINE);
     if (res == 0) {
         puts("[ok]\n");
     }