staging: wilc1000: move sdio_cmd52 & sdio_cmd53 struct to source file

Moved sdio_cmd52 & sdio_cmd53 struct from wilc_wlan_if.h, as its used in
wilc_sdio.cfile.

Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>