[rocprof-compute] Run roofline test on GPU 0 by default (#1390)

* rocprof-compute: Default roofline to GPU 0

Previously was running the roofline test on ALL GPUs but only
selecting the first entry in the roofline.csv. So even in default
ALL case, GPU 0 was selected.

* Update CHANGELOG.MD

* Use better wording in changelog entry

projects/rocprofiler-compute/CHANGELOG.md

@@ -146,6 +146,8 @@ Full documentation for ROCm Compute Profiler is available at [https://rocm.docs.
 * Default rocprof interface changed from rocprofv3 to rocprofiler-sdk
   * Use ROCPROF=rocprofv3 to use rocprofv3 interface
 
+* Roofline analysis now runs on GPU 0 by default instead of all GPUs.
+
 ### Removed
 
 * Usage of `rocm-smi` in favor of `amd-smi`.

projects/rocprofiler-compute/src/argparser.py

@@ -413,9 +413,9 @@ Examples:
         "--device",
         metavar="",
         required=False,
-        default=-1,
+        default=0,
         type=int,
-        help="\t\t\tTarget GPU device ID. (DEFAULT: ALL)",
+        help="\t\t\tTarget GPU device ID. (DEFAULT: 0)",
     )
     roofline_group.add_argument(
         "--kernel-names",