forked from Imagelibrary/rtems
* shared/openpic/openpic.c, shared/openpic/openpic.h: - eliminated conditional compilation (#ifdef mpc8240) The difference in register-layout between the EPIC and the std. openPIC is handled by an offset parameter which can be set at run-time (initialization) with a new routine 'openpic_set_src_offset()'. - allow BSP to define symbol BSP_OPEN_PIC_BIG_ENDIAN which builds the driver for big-endian register access (mpc8540). - openpic_disable_irq() now returns the old state so that it can be restored later.