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>

include/amd_smi/amdsmi.h

@@ -616,7 +616,8 @@ typedef struct {
   amdsmi_vram_type_t vram_type;
   amdsmi_vram_vendor_type_t vram_vendor;
   uint64_t vram_size;
-  uint64_t reserved[6];
+  uint32_t vram_bit_width;
+  uint64_t reserved[5];
 } amdsmi_vram_info_t;