drivers/si114x: Update kconfig model

drivers/si114x/Kconfig

@@ -5,33 +5,53 @@
 # directory for more details.
 #
 
-if TEST_KCONFIG
-
-choice
-    bool "Si1145/6/7 UV/Ambient light/Proximity sensors"
-    optional
-    depends on HAS_PERIPH_I2C
-    depends on TEST_KCONFIG
-
-config MODULE_SI1145
-    bool "SI1145"
-    select MODULE_SI114X
-
-config MODULE_SI1146
-    bool "SI1146"
-    select MODULE_SI114X
-
-config MODULE_SI1147
-    bool "SI1147"
-    select MODULE_SI114X
-
-endchoice
-
-config MODULE_SI114X
+menuconfig MODULE_SI114X
     bool
+    prompt "Si1145/6/7 UV/Ambient light/Proximity sensors" if !(MODULE_SAUL_DEFAULT && HAVE_SI114X)
+    default (MODULE_SAUL_DEFAULT && HAVE_SI114X)
+    depends on TEST_KCONFIG
     depends on HAS_PERIPH_I2C
     select MODULE_PERIPH_I2C
     select MODULE_ZTIMER
     select MODULE_ZTIMER_MSEC
 
-endif # TEST_KCONFIG
+choice SI114X_VARIANT
+    bool "variant"
+    depends on MODULE_SI114X
+    default MODULE_SI1145 if HAVE_SI1145
+    default MODULE_SI1146 if HAVE_SI1146
+    default MODULE_SI1147 if HAVE_SI1147
+
+config MODULE_SI1145
+    bool "SI1145"
+
+config MODULE_SI1146
+    bool "SI1146"
+
+config MODULE_SI1147
+    bool "SI1147"
+
+endchoice
+
+config HAVE_SI114X
+    bool
+    help
+        Indicates that a Si114X UV/Ambient light/Proximity sensor is present.
+
+config HAVE_SI1145
+    bool
+    select HAVE_SI114X
+    help
+        Indicates that a Si1145 UV/Ambient light/Proximity sensor is present.
+
+config HAVE_SI1146
+    bool
+    select HAVE_SI114X
+    help
+        Indicates that a Si1146 UV/Ambient light/Proximity sensor is present.
+
+config HAVE_SI1147
+    bool
+    select HAVE_SI114X
+    help
+        Indicates that a Si1147 UV/Ambient light/Proximity sensor is present.

tests/driver_si114x/app.config.test

@@ -4,5 +4,6 @@
 CONFIG_MODULE_ZTIMER=y
 CONFIG_MODULE_ZTIMER_MSEC=y
 
+CONFIG_MODULE_SI114X=y
 # This test should also work with Si1146 and Si1147 variants.
 CONFIG_MODULE_SI1145=y