There are some SD8787 cards which don't support 5GHz band.
Therefore initialise 5GHz band parameters only if hardware
supports the band.
Signed-off-by: NAmitkumar Karwar <akarwar@marvell.com>
Signed-off-by: NBing Zhao <bzhao@marvell.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>