misc: update remaining memory references to IEC standard

This commit brings the few remaining occurances
of kB, etc. into line with the IEC binary naming
standard.

Comments containing any such references have been
left unchanged.

Reference(s):
commit 2fc3f15770fcbc464e80d560b8bae167fc05e957

Signed-off-by: Jim Warner <james.warner@comcast.net>

ps/ps.1

@@ -921,7 +921,7 @@ t	tty	the device number of the controlling tty
 T	start_time	time process was started
 U	uid	user ID number
 u	user	user name
-v	vsize	total VM size in kB
+v	vsize	total VM size in KiB
 y	priority	kernel scheduling priority
 .\"K	stime	system time (conflict, system vs. start time)
 .TE

vmstat.c

@@ -783,7 +783,7 @@ int main(int argc, char *argv[])
 			default:
 				xerrx(EXIT_FAILURE,
 				     /* Translation Hint: do not change argument characters */
-				     _("-S requires k, K, m or M (default is kb)"));
+				     _("-S requires k, K, m or M (default is KiB)"));
 			}
 			szDataUnit[0] = optarg[0];
 			break;