wined3d: Use shader_sm1_read_opcode() in shader_get_registers_used().

[wine] / dlls / wineps.drv / wineps16.drv.spec

13 pascal -ret16 DeviceMode(word word str str) PSDRV_DeviceMode16
90 pascal -ret16 ExtDeviceMode(word word ptr str str ptr str word) PSDRV_ExtDeviceMode16
91 pascal DeviceCapabilities(str str word ptr ptr) PSDRV_DeviceCapabilities16
93 pascal -ret16 AdvancedSetupDialog(word word ptr ptr) PSDRV_AdvancedSetupDialog16