drm/amdgpu: Add rlcv firmware for frontdoor loading.

drm/amdgpu: Add rlcv firmware for frontdoor loading.

Rlcv is required to be loaded for frontdoor.

1. Add 2 rlcv ucode ids:
    AMDGPU_UCODE_RLC_IRAM_1 and AMDGPU_UCODE_RLC_DRAM_1

2. Add rlc_firmware_header_v2_5 for above 2 rlcv headers.

3. Add 2 types in psp_fw_gfx_if interface interacting with asp:
    GFX_FW_TYPE_RLX6_UCODE_CORE1 - RLCV IRAM
    GFX_FW_TYPE_RLX6_DRAM_BOOT_CORE1 - RLCV DRAM BOOT

Signed-off-by: Feifei Xu <Feifei.Xu@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>