misc: Kconfig: ensure adi-axi-data-offload.c compiled as module

As a bool, the driver cannot be compile as a module, even though the
driver supports it.

Signed-off-by: Jorge Marques <[email protected]>

Author: gastmaier

drivers/misc/Kconfig

@@ -51,7 +51,7 @@ config AD525X_DPOT_SPI
 	  module will be called ad525x_dpot-spi.
 
 config ADI_AXI_DATA_OFFLOAD
-	bool "support Analog Devices Data Offload Engine"
+	tristate "support Analog Devices Data Offload Engine"
 	depends on HAS_IOMEM
 	depends on OF
 	help

drivers/misc/adi-axi-data-offload.h

@@ -12,31 +12,9 @@
 
 struct axi_data_offload_state;
 
-#ifdef CONFIG_ADI_AXI_DATA_OFFLOAD
-
 int axi_data_offload_ctrl_bypass(struct axi_data_offload_state *st, bool en);
 int axi_data_offload_ctrl_oneshot(struct axi_data_offload_state *st, bool en);
 
 struct axi_data_offload_state *devm_axi_data_offload_get_optional(struct device *source);
 
-#else
-
-static inline int axi_data_offload_ctrl_bypass(struct axi_data_offload_state *st, bool en)
-{
-	return -ENODEV;
-}
-
-static inline int axi_data_offload_ctrl_oneshot(struct axi_data_offload_state *st, bool en)
-{
-	return -ENODEV;
-}
-
-static inline struct
-axi_data_offload_state *devm_axi_data_offload_get_optional(struct device *source)
-{
-	return NULL;
-}
-
-#endif /* CONFIG_ADI_AXI_DATA_OFFLOAD */
-
 #endif /* ADI_AXI_DATA_OFFLOAD_H_ */