staging: board: use appropriate macro to initialize struct

Make code more readable by using macros defined for initializing
struct resource

Signed-off-by: Aurabindo Jayamohanan <mail@aurabindo.in>
Link: https://lore.kernel.org/r/20190919113945.13700-1-mail@aurabindo.in


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>