Staging: rtl8723bs: Do not initialise static to 0.

Do not initialise static to 0.
Static variables by default initialise to 0.

This patch fixes the errors found by checkpatch.

Signed-off-by: Shreeya Patel <shreeya.patel23498@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>