Replace all occurances of __FUNCTION__ with __func__

Replace all occurances of __FUNCTION__ with __func__

Replace all occurs of __FUNCTION__ except for the check in checkpatch
with the non GCC specific __func__.

One line in hcd-musb.c was manually tweaked to pass checkpatch.

Signed-off-by: Alistair Francis <[email protected]>
Reviewed-by: Eric Blake <[email protected]>
Reviewed-by: Stefan Hajnoczi <[email protected]>
Reviewed-by: Anthony PERARD <[email protected]>
Reviewed-by: Juan Quintela <[email protected]>
Reviewed-by: Gerd Hoffmann <[email protected]>
[THH: Removed hunks related to pxa2xx_mmci.c (fixed already)]
Signed-off-by: Thomas Huth <[email protected]>