[earlgrey] issue: failed run code in sram

[lin-snail]

• Modify hw/top_earlgrey/dv/chip_smoketests.hjson : type change to '5', "SwTypeDebug" like below:
  sw_images: ["//sw/device/tests:uart_smoketest:5:new_rules"]
  Then check the 'uart_smoketest_sim_dv.dis' file, address map is 0x20000000, it is flash address area. Not sram address area.

• test result: run.log
  UVM_FATAL @ 10010.708289 us: (chip_sw_uart_smoke_vseq.sv:24) [uvm_test_top.env.virtual_sequencer.chip_sw_uart_smoke_vseq] wait timeout occurred!

• check wave.fsdb: pc jump to flash address area, the instruction is ffffffff.
  

How can I run code in sram? thanks!