Blackfin arch: spelling fixes

arch/blackfin/kernel/irqchip.c

arch/blackfin/kernel/traps.c

arch/blackfin/mach-bf533/boards/cm_bf533.c

arch/blackfin/mach-bf533/boards/ezkit.c

arch/blackfin/mach-bf533/ints-priority.c

arch/blackfin/mach-bf537/boards/generic_board.c

arch/blackfin/mach-bf537/boards/pnav10.c

arch/blackfin/mach-bf537/boards/stamp.c

arch/blackfin/mach-bf537/ints-priority.c

arch/blackfin/mach-bf561/boards/cm_bf561.c

arch/blackfin/mach-bf561/ints-priority.c

arch/blackfin/mach-common/ints-priority-dc.c

arch/blackfin/mach-common/ints-priority-sc.c

arch/blackfin/mm/blackfin_sram.c