riscv: Correct event usage for riscv_cpu_probe/setup

With having both an EVENT_SPY_SIMPLE setup for both riscv_cpu_probe and
riscv_cpu_setup we do not need the latter function to call the former
function as it will already have been done in time.

Fixes: 1c55d62fb9 ("riscv: cpu: make riscv_cpu_probe to EVT_DM_POST_INIT_R callback")
Tested-by: Milan P. Stanić <mps@arvanta.net>
Signed-off-by: Tom Rini <trini@konsulko.com>

arch/riscv/cpu/cpu.c

@@ -94,11 +94,7 @@ static void dummy_pending_ipi_clear(ulong hart, ulong arg0, ulong arg1)
 
 int riscv_cpu_setup(void)
 {
-	int ret;
-
-	ret = riscv_cpu_probe(ctx, event);
-	if (ret)
-		return ret;
+	int __maybe_unused ret;
 
 	/* Enable FPU */
 	if (supports_extension('d') || supports_extension('f')) {