amdgpu: add initial VegaM firmware

From internal commit:
20fd544d169eaf2741120a0cbeb5780f1e2935c9
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Josh Boyer <jwboyer@kernel.org>

WHENCE

@@ -2119,6 +2119,18 @@ File: amdgpu/polaris12_sdma1.bin
 File: amdgpu/polaris12_smc.bin
 File: amdgpu/polaris12_uvd.bin
 File: amdgpu/polaris12_vce.bin
+File: amdgpu/vegam_ce.bin
+File: amdgpu/vegam_me.bin
+File: amdgpu/vegam_me_2.bin
+File: amdgpu/vegam_mec.bin
+File: amdgpu/vegam_mec2.bin
+File: amdgpu/vegam_pfp.bin
+File: amdgpu/vegam_rlc.bin
+File: amdgpu/vegam_sdma.bin
+File: amdgpu/vegam_sdma1.bin
+File: amdgpu/vegam_smc.bin
+File: amdgpu/vegam_uvd.bin
+File: amdgpu/vegam_vce.bin
 File: amdgpu/vega10_acg_smc.bin
 File: amdgpu/vega10_asd.bin
 File: amdgpu/vega10_ce.bin