ssbi: Allow compilation as a module

The ssbi driver's read/write entry points are protected with wrappers
in the case when the driver isn't enabled.  These wrappers don't make
any sense, since a client of the SSBI bus won't work without it.  Make
these just regular functions, so that the SSBI driver can be built as
a module.
Signed-off-by: David Brown <davidb@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/ssbi/Kconfig

@@ -5,7 +5,7 @@
 menu "Qualcomm MSM SSBI bus support"
 
 config MSM_SSBI
-	bool "Qualcomm Single-wire Serial Bus Interface (SSBI)"
+	tristate "Qualcomm Single-wire Serial Bus Interface (SSBI)"
 	help
 	  If you say yes to this option, support will be included for the
 	  built-in SSBI interface on Qualcomm MSM family processors.

include/linux/msm_ssbi.h

@@ -33,17 +33,6 @@ struct msm_ssbi_platform_data {
 	enum msm_ssbi_controller_type controller_type;
 };
 
-#ifdef CONFIG_MSM_SSBI
 int msm_ssbi_write(struct device *dev, u16 addr, u8 *buf, int len);
 int msm_ssbi_read(struct device *dev, u16 addr, u8 *buf, int len);
-#else
-static inline int msm_ssbi_write(struct device *dev, u16 addr, u8 *buf, int len)
-{
-	return -ENXIO;
-}
-static inline int msm_ssbi_read(struct device *dev, u16 addr, u8 *buf, int len)
-{
-	return -ENXIO;
-}
-#endif
 #endif