staging: unisys: visorbus: Split else if blocks into multiple if.

Visorbus_configure had a block of "else if" clauses at the beginning of the
function. Simplify this to just being "if" clauses since each code block
ended with a goto.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>