arm64/syscall: Remove duplicate declaration

Commit 6ac19f9 ("arm64: avoid prototype warnings for syscalls")
added missing declarations to various syscall wrapper macros. It
however proved a little too zealous in __SYSCALL_DEFINEx(), as a
declaration for __arm64_sys##name was already present. A declaration
is required before the call to ALLOW_ERROR_INJECTION(), so keep
the original one and remove the new one.

Fixes: 6ac19f9 ("arm64: avoid prototype warnings for syscalls")
Signed-off-by: Kevin Brodsky <kevin.brodsky@arm.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20231109141153.250046-1-kevin.brodsky@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Author: kevin-brodsky-arm

arch/arm64/include/asm/syscall_wrapper.h

@@ -54,7 +54,6 @@
 	ALLOW_ERROR_INJECTION(__arm64_sys##name, ERRNO);			\
 	static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__));		\
 	static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));	\
-	asmlinkage long __arm64_sys##name(const struct pt_regs *regs);		\
 	asmlinkage long __arm64_sys##name(const struct pt_regs *regs)		\
 	{									\
 		return __se_sys##name(SC_ARM64_REGS_TO_ARGS(x,__VA_ARGS__));	\