coresight: read tmc-etr reservation size from DT node
coresight: read tmc-etr reservation size from DT node

Remove using hardcoded value for the TMC ETR allocation size in
the TMC driver and instead get the size from the DT node. This
will ensure only one location (DT) controls the size of the
allocation.

Change-Id: I642d149e124c98470821ac4a37627747aecd2af7
Signed-off-by: Pratik Patel <1acbbdd4274e187eda89cfa6ac00592dcfca8a01@codeaurora.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas