Adjust power_profile script to handle the new world order as well.
Some vendors are opting out of a C2 state and only defining C1 & C3. This
leads the acpi_cpu display to indicate that the machine supports C1 & C2
which is caused by the (mis)use of the index of the cx_state array as the
ACPI_STATE_CX value.
e.g. the code was pretending that cx_state[i] would
always convert to i by subtracting 1.
cx_state[2] == ACPI_STATE_C3
cx_state[1] == ACPI_STATE_C2
cx_state[0] == ACPI_STATE_C1
however, on certain machines this would lead to
cx_state[1] == ACPI_STATE_C3
cx_state[0] == ACPI_STATE_C1
This didn't break anything but led to a display of:
* dev.cpu.0.cx_supported: C1/1 C2/96
Instead of
* dev.cpu.0.cx_supported: C1/1 C3/96
MFC after: 2 weeks
7402aad3c7