[PATCH] i2c: powermac: Simplify reading the "reg" and "i2c-address" property

[Aishwarya R]

>> Use of_property_read_u32 to read the "reg" and "i2c-address" property
>> instead of using of_get_property to check the return values.
>>
>> Signed-off-by: Aishwarya R <aishwaryarj100 at gmail.com>

> This is quite a fragile driver. Have you tested it on HW?

This change is not tested with the Hardware.
But of_property_read_u32 is better here than generic of_get_property.
This make sure that value read properly independent of system endianess.