digsig: format dsi_sysfs.h

Constrain lines to 80 characters and remove trailing whitespace in dsi_sysfs.h

Signed-off-by: Rupert Muchembled <rupert@rmuch.net>
digsig: remove unnecessary braces in dsi_dev.c

Remove unnecessary braces from if statement in dsi_dev.c.

Signed-off-by: Rupert Muchembled <rupert@rmuch.net>
digsig: tidy dsi_pkcs1.c

Remove whitespace, unnecessary braces reported by checkpatch.pl, plus other
aesthetic changes.

Signed-off-by: Rupert Muchembled <rupert@rmuch.net>