drm/amd/display: Remove always-false branches

[WHAT]
program_prealpha_dealpha and hpo_frl_stream_enc_acquired are always
false and all branches depending on them will never be taken.

This is report

drm/amd/display: Remove always-false branches

[WHAT]
program_prealpha_dealpha and hpo_frl_stream_enc_acquired are always
false and all branches depending on them will never be taken.

This is reported as DEADCODE errors by Coverity.

Reviewed-by: Roman Li <roman.li@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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drm/amd/display: Add dcn42 DC resources

Display Core resources for DCN 4.2:
- CLK_MGR
- DCCG
- DIO
- DPP
- GPIO
- HPO
- HUBBUB
- HUBP
- HWSS
- IRQ
- MMHUBBUB
- MPC
- OPTC
- PG

Signed-off-by: Roman

drm/amd/display: Add dcn42 DC resources

Display Core resources for DCN 4.2:
- CLK_MGR
- DCCG
- DIO
- DPP
- GPIO
- HPO
- HUBBUB
- HUBP
- HWSS
- IRQ
- MMHUBBUB
- MPC
- OPTC
- PG

Signed-off-by: Roman Li <Roman.Li@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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