riscv: signal: Remove unlikely() from WARN_ON() condition

"WARN_ON(unlikely(x))" is excessive. WARN_ON() already uses unlikely()
internally.
Signed-off-by: Zhongqiu Han <quic_zhonhan@quicinc.com>
Reviewed-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Reviewed-by: Andy Chiu <andy.chiu@sifive.com>
Link: https://lore.kernel.org/r/20240620033434.3778156-1-quic_zhonhan@quicinc.comSigned-off-by: Palmer Dabbelt <palmer@rivosinc.com>

arch/riscv/kernel/signal.c

@@ -84,7 +84,7 @@ static long save_v_state(struct pt_regs *regs, void __user **sc_vec)
 	datap = state + 1;
 
 	/* datap is designed to be 16 byte aligned for better performance */
-	WARN_ON(unlikely(!IS_ALIGNED((unsigned long)datap, 16)));
+	WARN_ON(!IS_ALIGNED((unsigned long)datap, 16));
 
 	get_cpu_vector_context();
 	riscv_v_vstate_save(&current->thread.vstate, regs);