drm/amdgpu: Fix off by one in current_memory_partition_show()

The >= ARRAY_SIZE() should be > ARRAY_SIZE() to prevent an out of
bounds read.

Fixes: 012be6f22c01 ("drm/amdgpu: Add sysfs interfaces for NPS mode")
Reviewed-by: Lijo Lazar <[e-mail]>
Signed-off-by: Dan Carpenter <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

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

···
 	enum amdgpu_memory_partition mode;
 
 	mode = adev->gmc.gmc_funcs->query_mem_partition_mode(adev);
-	if ((mode > ARRAY_SIZE(nps_desc)) ||
+	if ((mode >= ARRAY_SIZE(nps_desc)) ||
 	    (BIT(mode) & AMDGPU_ALL_NPS_MASK) != BIT(mode))
 		return sysfs_emit(buf, "UNKNOWN\n");