staging: rtl8723bs: Change type to bool

res and Match have only either 'true' or 'false' values.
So making them of type bool for better readability of code.

Signed-off-by: Aastha Gupta <aastha.gupta4104@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>