p54: convert to sysdata API

The Coccinelle sysdata patches were used to help with
this transition. The changes have been carefully manually
vetted for. With the conversion we modify the cases that do
not need the firmware to be kept so that the sysdata API
can release it for us. Using the new sysdata API also means
we can get rid of our own completions.

Generated-by: Coccinelle SmPL
Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>