drm/amdgpu: bail out when failed to load fw in psp_init_cap_microcode()

drm/amdgpu: bail out when failed to load fw in psp_init_cap_microcode()

[ Upstream commit a0a455b4bc7483ad60e8b8a50330c1e05bb7bfcf ]

In function psp_init_cap_microcode(), it should bail out when failed to
load firmware, otherwise it may cause invalid memory access.

Fixes: 07dbfc6b102e ("drm/amd: Use `amdgpu_ucode_*` helpers for PSP")
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Jiang Liu <gerry@linux.alibaba.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>