staging: ks7010: rename identifier rc to ret
Driver uses identifier 'rc' to hold the value for error return code. The rest of the driver predominately uses 'ret' for this purpose. It is easier to follow the code if one name is used for one task. Rename identifier 'rc' to 'ret'. Signed-off-by: NTobin C. Harding <me@tobin.cc> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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