OMAP2/3 clock: convert wkup_clkdm PRM clocks to prm_clkdm

OMAP2/3 clock: convert wkup_clkdm PRM clocks to prm_clkdm

Convert existing wkup_clkdm clocks that should be in the PRM clockdomain
to prm_clkdm.  (A later patch will add PRM clockdomain associations for
unassociated clocks.)

References for the OMAP2xxx clocks:

OMAP2420 Multimedia Processor Silicon Revision 2.1.1, 2.2 TRM Version Q
  Figure 4-11:
      - alt_ck
  Figure 5-7:
      - func_32k_ck, osc_ck, sys_ck
  Figure 5-8 (assumes that "Level 0" = PRM)
      - dpll_ck, apll96_ck, apll54_ck, func_54m_ck
  Section 5.4.1.1:
      - sys_clkout_src, sys_clkout
  Section 29.3.1.1:
      - gpios_fck, mpu_wdt_fck, mpu_wdt_ick

References for the OMAP3xxx clocks:

OMAP34xx Multimedia Device Silicon Revision 3.0 Version I TRM
  Figure 4-54:
      - gpt1_fck, wkup_32k_fck, wdt2_fck, wkup_l4_fck, omap_32ksync_ick,
        gpt1_ick
  Section 25.3.1.1.3:
      - gpio1_fck, gpio1_ick

OMAP34xx Multimedia High Security (HS) Device Silicon Revision 3.0 Security
Addendum Version B TRM
  Table 2-5:
      - usim_ick
  Figure 3-29:
      - wdt1_ick, gpt12_ick

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>