OMAP2/3 clock: convert omap2_wait_clock_ready() to use clk.prcm_mod

Convert omap2_wait_clock_ready() to use clk.prcm_mod rather than a
void __iomem *.  This removes some cruft from clock24xx.c and sets
up further cruft removal in a subsequent patch.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.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/clock24xx.c
Simple merge