multiplier suffixes are short, store them directly in struct suffix_mult

function                                             old     new   delta
xstrtoul_range_sfx                                   226     217      -9
xstrtoull_range_sfx                                  291     280     -11
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-20)             Total: -20 bytes
   text    data     bss     dec     hex filename
 669128    2668   13616  685412   a7564 busybox_old
 669108    2668   13616  685392   a7550 busybox_unstripped

diff --git a/coreutils/split.c b/coreutils/split.c
index 7b4f8c2..d1eb829 100644
--- a/coreutils/split.c
+++ b/coreutils/split.c
@@ -20,7 +20,7 @@
 #if ENABLE_FEATURE_SPLIT_FANCY
 	{ "g", 1024*1024*1024 },
 #endif
-	{ NULL, 0 }
+	{ }
 };
 
 /* Increment the suffix part of the filename.