msm: scm: Provide empty stubs for scm functions

Instead of making other code dependent on #ifdef
CONFIG_MSM_SCM, add empty stubs for the scm functions

Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>

arch/arm/mach-msm/include/mach/scm.h

@@ -20,6 +20,7 @@
 #define SCM_SVC_INFO			0x6
 #define SCM_SVC_TZSCHEDULER		0xFC
 
+#ifdef CONFIG_MSM_SCM
 extern int scm_call(u32 svc_id, u32 cmd_id, const void *cmd_buf, size_t cmd_len,
 		void *resp_buf, size_t resp_len);
 
@@ -31,4 +32,33 @@ extern u32 scm_call_atomic2(u32 svc, u32 cmd, u32 arg1, u32 arg2);
 extern u32 scm_get_version(void);
 extern int scm_is_call_available(u32 svc_id, u32 cmd_id);
 
+#else
+
+static inline int scm_call(u32 svc_id, u32 cmd_id, const void *cmd_buf,
+		size_t cmd_len, void *resp_buf, size_t resp_len)
+{
+	return 0;
+}
+
+static inline u32 scm_call_atomic1(u32 svc, u32 cmd, u32 arg1)
+{
+	return 0;
+}
+
+static inline u32 scm_call_atomic2(u32 svc, u32 cmd, u32 arg1, u32 arg2)
+{
+	return 0;
+}
+
+static inline u32 scm_get_version(void)
+{
+	return 0;
+}
+
+static inline int scm_is_call_available(u32 svc_id, u32 cmd_id)
+{
+	return 0;
+}
+
+#endif
 #endif