amdgpu: add vram_type and vram_bit_width for interface query

Signed-off-by: Ken Wang <Qingqing.Wang@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
diff --git a/amdgpu/amdgpu.h b/amdgpu/amdgpu.h
index 17e5c1a..94fc647 100644
--- a/amdgpu/amdgpu.h
+++ b/amdgpu/amdgpu.h
@@ -516,6 +516,10 @@
 	uint32_t cu_active_number;
 	uint32_t cu_ao_mask;
 	uint32_t cu_bitmap[4][4];
+	/* video memory type info*/
+	uint32_t vram_type;
+	/* video memory bit width*/
+	uint32_t vram_bit_width;
 };