MIPS: Netlogic: add r4k_wait as the cpu_wait

Use r4k_wait as the CPU wait function for XLR/XLS processors.
Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2728/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/cpu-probe.c

@@ -191,6 +191,7 @@ void __init check_wait(void)
 	case CPU_CAVIUM_OCTEON_PLUS:
 	case CPU_CAVIUM_OCTEON2:
 	case CPU_JZRISC:
+	case CPU_XLR:
 		cpu_wait = r4k_wait;
 		break;