powman_configure_wakeup_state() broken

[eightycc]

Power Manager function powman_configure_wakeup_state() should do the following:

• Validate that the requested sleep state and the wake-up state adhere to the rules outlined in section 6.2.3 "Power State Transitions" of the RP2350 Datasheet.
• Configure the power sequencer SEQ_CFG register bits HW_PWRUP_SRAM0 and HW_PWRUP_SRAM1 to power the SRAM power domains when waking up as specified by the wakeup_state argument.

The current implementation has these issues:

• It will reject valid power state transitions such as P0.0 -> P1.7 -> P0.0, where the current state is P0.0, the sleep state is P1.7, and the wake-up state is P0.0.
• It does not take the current state into consideration when validating the sleep state.
• It does not validate that the sleep state is one of the P1.x states, or that the wake-up state is one of the P0.x states.
• It takes only the sleep state into consideration when setting SEQ_CFG register bits HW_PWRUP_SRAM0 and HW_PWRUP_SRAM1. Since these bits are defined: 0 for power-up and 1 for no change, both the sleep state and the wake-up state must be considered to set them correctly.