staging: r8188eu: remove obsolete comments

Remove some comments in HalPwrSeqCmd.c that contain no useful information.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220515155401.352742-3-martin@kaiser.cx
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>