Decrease static code size recording.c

Forgot static for recording_step_levels()

There is no need to re-calculate split_time or split_bytes each loop
you can't change them within recording screen --  these become constants

We don't need longs to store the conversion of minutes to seconds
or MB to bytes these are now shorts and the conversion takes place within
rec_timesplit_seconds() and rec_sizesplit_bytes() respectively

Change-Id: Ie1514085e92e00e67eb1942c0f4f8820714587e9
1 file changed