Sansa AMSv2: initialise PMU (power management unit), inspired by how the OF does it

Differences in PMU settings:
- explicitly disable the PLL inside the PMU (we don't use it)
- don't increase the PVDD1/AVDD17 voltages because the impact on runtime is still unclear

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30571 a1c6a512-1295-4272-9138-f99709370657

firmware/target/arm/powermgmt-ascodec.c

@@ -126,9 +126,6 @@ static void enable_charger(void)
 void powermgmt_init_target(void)
 {
     /* Everything CHARGER, OFF! */
-#if CONFIG_CPU == AS3525v2
-    ascodec_write_pmu(AS3543_CHARGER, 2, 0x01); //EOC current theshold 30%
-#endif
     ascodec_monitor_endofch();
     ascodec_write_charger(TMPSUP_OFF | CHG_I_50MA | CHG_V_3_90V | CHG_OFF);
 }