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 <[e-mail]>
To: [e-mail]
Patchwork: https://patchwork.linux-mips.org/patch/2728/
Signed-off-by: Ralf Baechle <[e-mail]>

arch/mips/kernel/cpu-probe.c

···
 	case CPU_CAVIUM_OCTEON_PLUS:
 	case CPU_CAVIUM_OCTEON2:
 	case CPU_JZRISC:
+	case CPU_XLR:
 		cpu_wait = r4k_wait;
 		break;