faster code means we get to sleep earlier. co-operative scheduling for same-priority makes kernel simpler and faster
Merge branch 'chibios_lowpower' into chibios_rambo
display the actual values  of CORTEX_ENABLE_WFI_IDLE and ENABLE_WFI_IDLE macros (if defined)
bring back some of SD/MMC card stuff lost to merge conflicts
add the sdcard commands to main
add debugs
these locks only seem to make things worse
Revert "these locks only seem to make things worse"

This reverts commit 33c0beca3cf36c02c396f5ac3b0e41915d1e34e8.
someone on the forum had some success in making a thread handle the mounting, but this does not work for me (no guarantees that I am actually doing it right though...)
Revert "someone on the forum had some success in making a thread handle the mounting, but this does not work for me (no guarantees that I am actually doing it right though...)"

This reverts commit 27ef1553c091e9c1a47fae7043a819cb1e259e1a.