build mpp,but test log show Rk3588 does not support

rock-5b:test:%  mpi_dec_test -i demo.mp4 

mpp[2326]: mpi_dec_utils: input file demo.mp4 size 257847677
mpp[2326]: mpi_dec_utils: cmd parse result:
mpp[2326]: mpi_dec_utils: input  file name: demo.mp4
mpp[2326]: mpi_dec_utils: output file name: 
mpp[2326]: mpi_dec_utils: width      :    0
mpp[2326]: mpi_dec_utils: height     :    0
mpp[2326]: mpi_dec_utils: type       :    0
mpp[2326]: mpi_dec_utils: max frames :    0
mpp[2326]: mpi_dec_test: mpi_dec_test start
mpp[2326]: mpp_info: mpp version: d7f0b0e author: sayon.chen     2022-09-27 [hal_h265]: Fix memset strmbuf align_offset maybe overflow
mpp[2326]: mpi_dec_test: 0x55964a62e0 mpi_dec_test decoder test start w 0 h 0 type 0
mpp[2326]: mpp: unable to create dec unused for soc rk3588 unsupported
mpp[2326]: mpi_dec_test: 0x55964a62e0 mpp_init failed
mpp[2326]: mpi_dec_test: test failed ret -1
mpi_dec_test[2326]: mpp_mem_pool: put_pool found 1 used buffer size 304

rock-5b:test:% uname -a                                                                                                                                                  <develop>
Linux rock-5b 5.10.72-rockchip-rk3588 #trunk.0046 SMP Wed Sep 28 03:43:58 UTC 2022 aarch64 aarch64 aarch64 GNU/Linux

rock-5b:test:% lsb_release -a                                                                                                                                            <develop>
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 22.04.1 LTS
Release:        22.04
Codename:       jammy
HermanChen / mpp

build mpp,but test log show Rk3588 does not support #50
