powerpc: Remove duplicate definition for ppc_msgsnd_sync()

Remove duplicate definition of ppc_msgsnd_sync() introduced in commit
b87ac0218355 ("powerpc: Introduce msgsnd/doorbell barrier primitives").

No functional change intended.

Signed-off-by: Gautam Menghani <[e-mail]>
Reviewed-by: Ritesh Harjani (IBM) <[e-mail]>
[maddy: Updated commit message to fixed checkpatch.pl warning]
Signed-off-by: Madhavan Srinivasan <[e-mail]>
Link: https://patch.msgid.link/[e-mail]

arch/powerpc/include/asm/dbell.h

···
 				: : "i" (CPU_FTR_HVMODE), "r" (msg));
 }
 
-/* sync before sending message */
-static inline void ppc_msgsnd_sync(void)
-{
-	__asm__ __volatile__ ("sync" : : : "memory");
-}
-
 /* sync after taking message interrupt */
 static inline void ppc_msgsync(void)
 {
···
 	__asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
 }
 
-/* sync before sending message */
-static inline void ppc_msgsnd_sync(void)
-{
-	__asm__ __volatile__ ("sync" : : : "memory");
-}
-
 /* sync after taking message interrupt */
 static inline void ppc_msgsync(void)
 {
···
 #endif /* CONFIG_PPC_BOOK3S */
 
 extern void doorbell_exception(struct pt_regs *regs);
+
+/* sync before sending message */
+static inline void ppc_msgsnd_sync(void)
+{
+	__asm__ __volatile__ ("sync" : : : "memory");
+}
 
 static inline void ppc_msgsnd(enum ppc_dbell type, u32 flags, u32 tag)
 {