u16 Clock Control Fast Powerup Delay

1. If chipcommon capabilities & 0x10000000 is not zero

   1. Disable interrupts

   2. Set delay to output of PMU Fast Powerup Delay

   3. Enable interrupts
   4. Return delay

2. If chipcommon capabilities & 0x40000 is zero

   1. Return 0
3. Set fast to false

4. If bus type is PCI-E or (but type is PCI and PCI core revision >= 13)

   1. Set fast to true
5. Set delay to 0
6. If fast is false
   1. Save current core index
   2. Disable interrupts
   3. Make chipcommon core active
7. Get minfreq from chipco_pctl_clockfreqlimit with argument 0 (This routine is in current ssb driver.)
8. Read register 0x00B0 to get pll_on_delay
9. Set delay to ((pll_on_delay + 2) * 1,000,000 + (minfreq - 1)) / minfreq
10. If fast is false
    1. Restore original core
    2. Enable interrupts
11. Return delay