MIPS: Netlogic: XLP2XX CPU and PIC frequency

Add code to calculate the CPU and PIC frequency for XLP2XX SoCs.

Since the PIC frequency on XLP2XX can be configured, add a new macro
pic_timer_freq() to be used in netlogic/common/time.c.

Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Cc: Ganesan Ramalingam <ganesanr@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/5701/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --cc arch/mips/include/asm/netlogic/xlp-hal/pic.h
Simple merge

diff --cc arch/mips/include/asm/netlogic/xlp-hal/sys.h
Simple merge

diff --cc arch/mips/include/asm/netlogic/xlr/pic.h
Simple merge

diff --cc arch/mips/netlogic/common/time.c
Simple merge

diff --cc arch/mips/netlogic/xlp/nlm_hal.c
Simple merge