soc: bcm: bcm2835-power: Resolve ASB register macros

The macros in order to access the ASB registers have a hard coded base
address. So extending them for other platforms would make them harder
to read. As a solution resolve these macros.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Peter Robinson <pbrobinson@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20220625113619.15944-10-stefan.wahren@i2se.com