powerpc/64s: Fix misleading SPR and timebase information

pr_info shows SPR and timebase as a decimal value with a '0x'
prefix, which is somewhat misleading.

Fix it to print hexadecimal, as was intended.

Fixes: 10d91611 ("powerpc/64s: Reimplement book3s idle code in C")
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Shaokun Zhang <zhangshaokun@hisilicon.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/platforms/powernv/idle.c

@@ -1159,10 +1159,10 @@ static void __init pnv_power9_idle_init(void)
 			pnv_deepest_stop_psscr_mask);
 	}
 
-	pr_info("cpuidle-powernv: First stop level that may lose SPRs = 0x%lld\n",
+	pr_info("cpuidle-powernv: First stop level that may lose SPRs = 0x%llx\n",
 		pnv_first_spr_loss_level);
 
-	pr_info("cpuidle-powernv: First stop level that may lose timebase = 0x%lld\n",
+	pr_info("cpuidle-powernv: First stop level that may lose timebase = 0x%llx\n",
 		pnv_first_tb_loss_level);
 }