staging: ks7010: rename identifier retval to ret
Function uses identifier 'retval' to hold the error return value. The rest of the driver uses 'ret' for this purpose. Being uniform in the choice of identifiers generally adds to the cleanliness of the code, also it is arguably easier to follow the code if one name is used for one task. Rename identifier 'retval' to 'ret'. Signed-off-by: NTobin C. Harding <me@tobin.cc> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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