amdgpu: update VCN 3.1.2 firmware

From internal git commit:
82c3ef8fd13470434a51b8323a7b33ede62e5c1a

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/amdgpu/vcn_3_1_2.bin b/amdgpu/vcn_3_1_2.bin
index b292a94..23f4557 100644
--- a/amdgpu/vcn_3_1_2.bin
+++ b/amdgpu/vcn_3_1_2.bin
Binary files differ