MIPS: Netlogic: Identify XLP 9XX chip

Adds processor ID of XLP 9XX to asm/cpu.h.  Update netlogic/xlp-hal/xlp.h
to add cpu_is_xlp9xx() and to update cpu_is_xlpii() to support XLP 9XX.

Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/6274/

arch/mips/netlogic/xlp/setup.c

@@ -111,6 +111,7 @@ void __init plat_mem_setup(void)
 const char *get_system_type(void)
 {
 	switch (read_c0_prid() & 0xff00) {
+	case PRID_IMP_NETLOGIC_XLP9XX:
 	case PRID_IMP_NETLOGIC_XLP2XX:
 		return "Broadcom XLPII Series";
 	default: