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

Cc: Gerhard Sittig <gsi@denx.de>
Cc: Scott Wood <scottwood@freescale.com>
Acked-by: NAnatolij Gustschin <agust@denx.de>
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>