6 implement modul access pixtend hardware

[SmySmy]

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[huebl]

The build failed on PC.

[SmySmy]

the following cmake options are now available: ("src/CMakeLists.txt") option(OPCUAPIXTENDSERVER_MODULE_V2S_HARDWARE_ACCESS "module v2s use real hardware access" OFF) option(OPCUAPIXTENDSERVER_MODULE_V2L_HARDWARE_ACCESS "module v2l use real hardware access" OFF) option(OPCUAPIXTENDSERVER_MODULE_EIOAO_HARDWARE_ACCESS "module eIO analog one use real hardware access" OFF) option(OPCUAPIXTENDSERVER_MODULE_EIODO_HARDWARE_ACCESS "module eIO digial one use real hardware access" OFF)

option(OPCUAPIXTENDSERVER_ACCESS_SPI "hardware access use spi interface" OFF)