hw/i386/pc: Use address_space_memory in place

The address_space_memory variable is used once.
Use it in place and remove the argument.
Suggested-by: NSamuel Ortiz <sameo@linux.intel.com>
Reviewed-by: NLi Qiang <liq3ea@gmail.com>
Signed-off-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190818225414.22590-4-philmd@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

hw/i386/pc.c

@@ -936,7 +936,7 @@ static void pc_build_smbios(PCMachineState *pcms)
     }
 }
 
-static FWCfgState *bochs_bios_init(AddressSpace *as, PCMachineState *pcms)
+static FWCfgState *bochs_bios_init(PCMachineState *pcms)
 {
     FWCfgState *fw_cfg;
     uint64_t *numa_fw_cfg;
@@ -946,7 +946,8 @@ static FWCfgState *bochs_bios_init(AddressSpace *as, PCMachineState *pcms)
     MachineState *ms = MACHINE(pcms);
     int nb_numa_nodes = ms->numa_state->num_nodes;
 
-    fw_cfg = fw_cfg_init_io_dma(FW_CFG_IO_BASE, FW_CFG_IO_BASE + 4, as);
+    fw_cfg = fw_cfg_init_io_dma(FW_CFG_IO_BASE, FW_CFG_IO_BASE + 4,
+                                &address_space_memory);
     fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, pcms->boot_cpus);
 
     /* FW_CFG_MAX_CPUS is a bit confusing/problematic on x86:
@@ -1868,7 +1869,7 @@ void pc_memory_init(PCMachineState *pcms,
                                         option_rom_mr,
                                         1);
 
-    fw_cfg = bochs_bios_init(&address_space_memory, pcms);
+    fw_cfg = bochs_bios_init(pcms);
 
     rom_set_fw(fw_cfg);