6lowpan: mac802154: fix coding style issues

This patch fixed the coding style issues reported by checkpatch.pl

following issues fixed:
	CHECK: Alignment should match open parenthesis
	WARNING: line over 80 characters
	CHECK: Blank lines aren't necessary before a close brace '}'
	WARNING: networking block comments don't use an empty /* line, use /* Comment...
	WARNING: Missing a blank line after declarations
	WARNING: networking block comments start with * on subsequent lines
	CHECK: braces {} should be used on all arms of this statement

Signed-off-by: Varka Bhadram <varkab@cdac.in>
Tested-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/mac802154/tx.c b/net/mac802154/tx.c
index 6d16473..8124353 100644
--- a/net/mac802154/tx.c
+++ b/net/mac802154/tx.c
@@ -98,6 +98,7 @@
 	if (!(priv->hw.flags & IEEE802154_HW_OMIT_CKSUM)) {
 		u16 crc = crc_ccitt(0, skb->data, skb->len);
 		u8 *data = skb_put(skb, 2);
+
 		data[0] = crc & 0xff;
 		data[1] = crc >> 8;
 	}