Staging: comedi: addi_amcc_S5920.c: Checkpatch cleanup

WARNING: braces {} are not necessary for any arm of this statement
+			if (i_Counter == 0) {
[...]
+			} else {
[...]

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>