SWDEV-463399: amdsmi_get_gpu_vram_info() adds bit-width

Driver info `amdgpu_gpu_info.vram_bit_width` is exposed through amdsmi_get_gpu_vram_info().

Code changes related to the following:
  * API
  * CLI
  * Unit tests
  * Examples

Change-Id: I8abd8db7a603078b2b1c008b2685cecf35caf3d2
Signed-off-by: Oliveira, Daniel <daniel.oliveira@amd.com>

py-interface/amdsmi_wrapper.py

@@ -953,7 +953,9 @@ struct_amdsmi_vram_info_t._fields_ = [
     ('vram_type', amdsmi_vram_type_t),
     ('vram_vendor', amdsmi_vram_vendor_type_t),
     ('vram_size', ctypes.c_uint64),
-    ('reserved', ctypes.c_uint64 * 6),
+    ('vram_bit_width', ctypes.c_uint32),
+    ('PADDING_0', ctypes.c_ubyte * 4),
+    ('reserved', ctypes.c_uint64 * 5),
 ]
 
 amdsmi_vram_info_t = struct_amdsmi_vram_info_t