microblaze: Remove unneded per cpu SYSCALL_SAVE variable

Signed-off-by: Michal Simek <monstr@monstr.eu>

arch/microblaze/include/asm/entry.h

@@ -29,7 +29,6 @@ DECLARE_PER_CPU(unsigned int, KM); /* Kernel/user mode */
 DECLARE_PER_CPU(unsigned int, ENTRY_SP); /* Saved SP on kernel entry */
 DECLARE_PER_CPU(unsigned int, R11_SAVE); /* Temp variable for entry */
 DECLARE_PER_CPU(unsigned int, CURRENT_SAVE); /* Saved current pointer */
-DECLARE_PER_CPU(unsigned int, SYSCALL_SAVE); /* Saved syscall number */
 # endif /* __ASSEMBLY__ */
 
 #endif /* _ASM_MICROBLAZE_ENTRY_H */