omap2/3: clockdomains: fix compile-time warnings

This patch fixes these warnings when building kernel for OMAP3EVM
only.

  CC      arch/arm/mach-omap2/clockdomains2xxx_3xxx_data.o
arch/arm/mach-omap2/clockdomains2xxx_3xxx_data.c:95: warning:
 'dsp_24xx_wkdeps' defined but not used
arch/arm/mach-omap2/clockdomains2xxx_3xxx_data.c:119: warning:
 'mpu_24xx_wkdeps' defined but not used
arch/arm/mach-omap2/clockdomains2xxx_3xxx_data.c:147: warning:
 'core_24xx_wkdeps' defined but not used

The problem should be noticed when building for other OMAP3
platforms (only) as well.

Signed-off-by: Sanjeev Premi <premi@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>