Remove unnecessary prom.h include in preparation to make prom.h optional.
Signed-off-by: NRob Herring <rob.herring@calxeda.com>
Acked-by: NCatalin Marinas <catalin.marinas@arm.com>
Acked-by: NGrant Likely <grant.likely@linaro.org>
Cc: Will Deacon <will.deacon@arm.com>