powerpc/64: Remove unused SYS_CALL_TABLE symbol

In interrupt_64.S, formerly entry_64.S, there are two toc entries
created for sys_call_table and compat_sys_call_table.

These are no longer used, since the system call entry was converted from
asm to C, so remove them.

Fixes: 68b34588 ("powerpc/64/sycall: Implement syscall entry/exit logic in C")
Acked-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220913124545.2817825-1-mpe@ellerman.id.au

arch/powerpc/kernel/interrupt_64.S

@@ -13,16 +13,6 @@
 #include <asm/ppc_asm.h>
 #include <asm/ptrace.h>
 
-	.section	".toc","aw"
-SYS_CALL_TABLE:
-	.tc sys_call_table[TC],sys_call_table
-
-#ifdef CONFIG_COMPAT
-COMPAT_SYS_CALL_TABLE:
-	.tc compat_sys_call_table[TC],compat_sys_call_table
-#endif
-	.previous
-
 	.align 7
 
 .macro DEBUG_SRR_VALID srr