drm/amdgpu: fix UBSAN array-index-out-of-bounds for ras_block_string[]

fix array index out of bounds issue for ras_block_string[] array.

Fixes: 30df05fb ("drm/amdgpu: Align ras block enum with firmware")
Signed-off-by: Yang Wang <kevinyang.wang@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c

@@ -74,6 +74,8 @@ const char *ras_block_string[] = {
 	"mca",
 	"vcn",
 	"jpeg",
+	"ih",
+	"mpio",
 };
 
 const char *ras_mca_block_string[] = {
@@ -95,7 +97,8 @@ const char *get_ras_block_str(struct ras_common_if *ras_block)
 	if (!ras_block)
 		return "NULL";
 
-	if (ras_block->block >= AMDGPU_RAS_BLOCK_COUNT)
+	if (ras_block->block >= AMDGPU_RAS_BLOCK_COUNT ||
+	    ras_block->block >= ARRAY_SIZE(ras_block_string))
 		return "OUT OF RANGE";
 
 	if (ras_block->block == AMDGPU_RAS_BLOCK__MCA)