Provide a mechanism for OMAP chip family (e.g., OMAP1, 2, 3) clock
code to define a clk_register function via struct clk_functions.  This
is currently only used for OMAP2/3, to handle clock->clockdomain
registration.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>