arm: atmel: sama5d3: correct the ID for DBGU and PIT

As the DBGU and PIT has its own ID on sama5d3 SoC, while not share
with SYS ID. So, correct them.

Signed-off-by: Bo Shen <voice.shen@atmel.com>
arm: at91: pm9261: remove undefined bit in mckr

The PLLADIV2 bit is not defined in at91sam9261 SoC, so remove it.

Signed-off-by: Bo Shen <voice.shen@atmel.com>
arm: atmel: sama5d3: correct the error define of DIV

Correct the error define of DIV.

Signed-off-by: Bo Shen <voice.shen@atmel.com>
arm: atmel: sama5d3: the offset of MULA is 18

The offset of MULA field in PLLA register in sama5d3 is 18,
and the length only 7 bits.

Signed-off-by: Bo Shen <voice.shen@atmel.com>
arm: atmel: sama5d3: early enable PIO peripherals

Enable the PIO peripherals early than other peripherals.

Signed-off-by: Bo Shen <voice.shen@atmel.com>