staging: rtl8723bs: os_dep: added blank line to fix coding style issue

Fixed a coding style issue by adding a blank line after declarations in
sdio_intf.c to fix a checkpatch warning.

Signed-off-by: Ross Schmidt <ross.schm.dev@gmail.com>
Link: https://lore.kernel.org/r/20200902192044.19143-1-ross.schm.dev@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>