coresight: return error if null or error is passed to coresight_register
coresight: return error if null or error is passed to coresight_register

Fail coresight_register if invalid (error or null) argument is
passed to avoid crashes.

Change-Id: I6c39ba2b81333f24480fdf5b348934651e095be5
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