isdn: whitespace coding style cleanup

isdn source code uses a not-current coding style.

Update the coding style used on a per-line basis
so that git diff -w shows only elided blank lines
at EOF.

Done with emacs and some scripts and some typing.

Built x86 allyesconfig.
No detected change in objdump -d or size.

Signed-off-by: Joe Perches <joe@perches.com>

drivers/isdn/i4l/isdn_ppp.h

@@ -39,5 +39,3 @@ extern int isdn_ppp_unregister_compressor(struct isdn_ppp_compressor *ipc);
 #define IPPP_ASSIGNED	0x10
 
 #define IPPP_MAX_HEADER 10
-
-