soc/fsl/qbman: Drop L1_CACHE_BYTES compile time check

Not relevant and arch dependent. Overkill for PPC.

Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Li Yang <leoyang.li@nxp.com>