Commonalize typical [b,]k,m suffix struct

function                                             old     new   delta
bkm_suffixes                                           -      32     +32
static.km_suffixes                                    24       -     -24
suffixes                                              32       -     -32
static.bkm                                            32       -     -32
head_tail_suffixes                                    32       -     -32
------------------------------------------------------------------------------
(add/remove: 2/6 grow/shrink: 0/0 up/down: 72/-160)           Total: -88 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/libbb/xatonum.c b/libbb/xatonum.c
index 62bbe53..6f4e023 100644
--- a/libbb/xatonum.c
+++ b/libbb/xatonum.c
@@ -68,3 +68,10 @@
 {
 	return xatou_range(numstr, 0, 0xffff);
 }
+
+const struct suffix_mult bkm_suffixes[] = {
+	{ "b", 512 },
+	{ "k", 1024 },
+	{ "m", 1024*1024 },
+	{ "", 0 }
+};