drivers/char/: Spelling fixes

drivers/char/drm/r300_reg.h

drivers/char/drm/via_dma.c

drivers/char/efirtc.c

drivers/char/epca.c

drivers/char/hangcheck-timer.c

drivers/char/hvcs.c

drivers/char/ip2/i2lib.c

drivers/char/ip2/ip2main.c

drivers/char/synclink.c

drivers/char/toshiba.c