brcmsmac: cosmetic change in phy_lcn.c

Cleaning up some code fragments reducing indentation and uncluttering
some lines. Apart from whitespace there are no actual code changes
made.

Cc: Jonas Gorski <jogo@openwrt.org>
Tested-by: David Herrmann <dh.herrmann@gmail.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>