sparc64: convert to generic execve

We still have wrappers, but nowhere near as scary as they used to be.
I'm not sure how necessary that flushw is now, TBH...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/sparc/include/asm/syscalls.h

@@ -8,6 +8,8 @@ extern asmlinkage long sparc_do_fork(unsigned long clone_flags,
 				     struct pt_regs *regs,
 				     unsigned long stack_size);
 
+#ifndef __arch64__
 extern asmlinkage int sparc_execve(struct pt_regs *regs);
+#endif
 
 #endif /* _SPARC64_SYSCALLS_H */

arch/sparc/include/asm/unistd.h

@@ -45,6 +45,7 @@
 #define __ARCH_WANT_COMPAT_SYS_TIME
 #define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND
 #define __ARCH_WANT_COMPAT_SYS_SENDFILE
+#define __ARCH_WANT_SYS_EXECVE
 #endif
 
 /*