drivers/adcxx1c: Update kconfig model

drivers/adcxx1c/Kconfig

@@ -5,32 +5,10 @@
 # directory for more details.
 #
 
-choice
+menuconfig MODULE_ADCXX1C
-    bool "ADCXX1C Analog-to-Digital converter"
-    depends on HAS_PERIPH_GPIO
-    depends on HAS_PERIPH_GPIO_IRQ
-    depends on HAS_PERIPH_I2C
-    depends on TEST_KCONFIG
-    optional
-    help
-        This driver works with adc081c, adc101c and adc121c models. Select one.
-
-config MODULE_ADC081C
-    bool "ADC081C"
-    select MODULE_ADCXX1C
-
-config MODULE_ADC101C
-    bool "ADC101C"
-    select MODULE_ADCXX1C
-
-config MODULE_ADC121C
-    bool "ADC121C"
-    select MODULE_ADCXX1C
-
-endchoice
-
-config MODULE_ADCXX1C
     bool
+    prompt "ADCXX1C Analog-to-Digital converter" if !(SAUL_DEFAULT && HAVE_ADCXX1C)
+    default SAUL_DEFAULT && HAVE_ADCXX1C
     depends on HAS_PERIPH_GPIO
     depends on HAS_PERIPH_GPIO_IRQ
     depends on HAS_PERIPH_I2C
@@ -38,3 +16,46 @@ config MODULE_ADCXX1C
     select MODULE_PERIPH_GPIO
     select MODULE_PERIPH_GPIO_IRQ
     select MODULE_PERIPH_I2C
+
+choice ADCXX1C_VARIANT
+    bool "Variants"
+    depends on MODULE_ADCXX1C
+    default MODULE_ADC081C if HAVE_ADC081C
+    default MODULE_ADC101C if HAVE_ADC101C
+    default MODULE_ADC121C if HAVE_ADC121C
+    help
+        This driver works with adc081c, adc101c and adc121c models. Select one.
+
+config MODULE_ADC081C
+    bool "ADC081C"
+
+config MODULE_ADC101C
+    bool "ADC101C"
+
+config MODULE_ADC121C
+    bool "ADC121C"
+
+endchoice
+
+config HAVE_ADCXX1C
+    bool
+    help
+        Indicates that ADCXX1C Analog-to-Digital is present.
+
+config HAVE_ADC081C
+    bool
+    select HAVE_ADCXX1C
+    help
+        Indicates that ADC081C Analog-to-Digital is present.
+
+config HAVE_ADC101C
+    bool
+    select HAVE_ADCXX1C
+    help
+        Indicates that ADC101C Analog-to-Digital is present.
+
+config HAVE_ADC121C
+    bool
+    select HAVE_ADCXX1C
+    help
+        Indicates that ADC121C Analog-to-Digital is present.

tests/driver_adcxx1c/app.config.test

@@ -1,4 +1,5 @@
 # this file enables modules defined in Kconfig. Do not use this file for
 # application configuration. This is only needed during migration.
 CONFIG_MODULE_ADC081C=y
+CONFIG_MODULE_ADCXX1C=y
 CONFIG_MODULE_XTIMER=y