add support for GPUs using wavefront size of 32 (#285)

* add gfx1100 support

Add support for Radeon 7900 GPUs (RX and PRO), and 7800 PRO.

I was contemplating to add gfx1101 and gfx1102 GPUs as well, but those are the lower end models that are more unlikely to be used for compute intensive jobs. In addition, I do not have access to them to test the support.

* update WF_SIZe for different options

Radeon systems use a WarpSize of 32, unlike current Instinct systems,
which use a warp size of 64. For the device side, a gfx specific ifdef
is sufficient. For the host side, we need to query the device
properties.

* adjust functional tests to wf_size of 32

* update unit tests to handle wf_size of 32

* address reviewer comments

[ROCm/rocshmem commit: d0c2845031]

projects/rocshmem/tests/functional_tests/default_ctx_primitive_tester.cpp

@@ -42,10 +42,12 @@
  
    /**
     * Shared array to capture the start time for each wavefront
-    * Max threads per block = 1024, wavefront size = 64 (in most GPUs)
-    * Maximum array size required = 1024/64 = 16
+   * Max threads per block = 1024, wavefront size = 64 or 32 depending
+   * on the GPUs. Using 32 since its safer for the dimensioning of the array,
+   * the last 16 elements will not be used on GPUs with a wf size of 64.
+   * Maximum array size required = 1024/32 = 32
     */
-   __shared__ long long int wf_start_time[16];
+   __shared__ long long int wf_start_time[32];
  
    /**
     * Calculate start index for each thread within the grid
@@ -190,4 +192,3 @@
      }
    }
  }
-