libertas: define macros for SDIO model numbers

replace direct usages of SDIO model numbers with defined macros.

Signed-off-by: Bing Zhao <bzhao@marvell.com>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --cc drivers/net/wireless/libertas/if_sdio.c
Simple merge

diff --cc drivers/net/wireless/libertas/if_sdio.h
Simple merge