move pci_irq_map definitions into the board specific files

target/linux/adm5120/files/arch/mips/adm5120/board.c

...linux/adm5120/files/arch/mips/adm5120/boards/cellvision.c

target/linux/adm5120/files/arch/mips/adm5120/boards/compex.c

target/linux/adm5120/files/arch/mips/adm5120/boards/edimax.c

...et/linux/adm5120/files/arch/mips/adm5120/boards/generic.c

...t/linux/adm5120/files/arch/mips/adm5120/boards/infineon.c

...t/linux/adm5120/files/arch/mips/adm5120/boards/mikrotik.c

target/linux/adm5120/files/arch/mips/adm5120/boards/zyxel.c

target/linux/adm5120/files/arch/mips/adm5120/platform.c

target/linux/adm5120/files/arch/mips/pci/pci-adm5120.c

...m5120/files/include/asm-mips/mach-adm5120/adm5120_board.h

...20/files/include/asm-mips/mach-adm5120/adm5120_platform.h