split out magnetometer

drivers/sensor/bmm150/Kconfig

@@ -0,0 +1,17 @@
+config BMM150
+	bool "BMM150"
+	default y
+	depends on DT_HAS_BOSCH_BMM150_ENABLED
+	help
+	  Enable driver for BMM150.
+
+if BMM150
+
+config BMM150_TRIGGER
+	bool "BMM150 trigger mode"
+	depends on BMM150
+	help
+	  Set to enable trigger mode using gpio interrupt, where
+	  interrupts are configured to line ALERT PIN.
+
+endif # BMM150