amdgpu: Add aldebaran firmware from 21.50

From internal git commit:
b146bcb22054e697b287a2bdab8069f49e4c26b2

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Josh Boyer <jwboyer@kernel.org>

WHENCE

@@ -2674,6 +2674,14 @@ File: amdgpu/cyan_skillfish2_pfp.bin
 File: amdgpu/cyan_skillfish2_rlc.bin
 File: amdgpu/cyan_skillfish2_sdma.bin
 File: amdgpu/cyan_skillfish2_sdma1.bin
+File: amdgpu/aldebaran_mec2.bin
+File: amdgpu/aldebaran_mec.bin
+File: amdgpu/aldebaran_rlc.bin
+File: amdgpu/aldebaran_sdma.bin
+File: amdgpu/aldebaran_smc.bin
+File: amdgpu/aldebaran_sos.bin
+File: amdgpu/aldebaran_ta.bin
+File: amdgpu/aldebaran_vcn.bin
 
 Licence: Redistributable. See LICENSE.amdgpu for details.