clk: ti: remove exported ll_ops struct, instead add an API for registration

We should avoid exporting data from drivers, instead use an API for
registering the clock low level operations.

Signed-off-by: Tero Kristo <t-kristo@ti.com>

diff --cc arch/arm/mach-omap2/clock.c
Simple merge

diff --cc arch/arm/mach-omap2/clock.h
Simple merge

diff --cc arch/arm/mach-omap2/io.c
Simple merge

diff --cc drivers/clk/ti/clk.c
Simple merge

diff --cc drivers/clk/ti/clock.h
Simple merge

diff --cc drivers/clk/ti/clockdomain.c
Simple merge

diff --cc include/linux/clk/ti.h
Simple merge