powerpc: mpc8xx: delete an unused source file

References to the wireless keyboard should also be removed
from README.console.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Wolfgang Denk <wd@denx.de>
Acked-by: Wolfgang Denk <wd@denx.de>
2 files changed