powerpc/512x: clk: Include clk.h
powerpc/512x: clk: Include clk.h

This clock provider uses the consumer API, so include clk.h
explicitly.

Cc: Gerhard Sittig <c9b3437932eed090edbebd577212b9961ce000fb@denx.de>
Cc: Scott Wood <b77916c2feab81a70245e7b5671f4f02730ebf64@freescale.com>
Acked-by: Anatolij Gustschin <f79f5d5f0b8928b7f49f0262a90d53ad98a87c22@denx.de>
Signed-off-by: Stephen Boyd <010521127f513270fe503d86ab8316ac5147f4b7@codeaurora.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs