The power sequences are now defined and processed in the same file. We
can move the defines for power sequences and the related struct and
enum from HalPwrSeqCmd.h to HalPwrSeqCmd.c. They don't have to be visible
in other files any more.

Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220704145221.159949-2-martin@kaiser.cxSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>