ARM: dts: msm: add coresight byte counter interrupt for mdmfermium

Add device tree entry to support CoreSight byte counter interrupt
feature which raises an interrupt on transfer of programmed
number of bytes to ETR-memory.

Change-Id: Ifd4091e55a742103033a4a90b8712d9b055fb64e
Signed-off-by: Shaoqing Liu <shaoqingliu@codeaurora.org>
Signed-off-by: Xiaogang Cui <xiaogang@codeaurora.org>