staging: rtl8723bs: fix camel case inside function

fix camel case inside function Hal_GetChnlGroup8723B()

Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/831b5f56cc6df8885ac61837fe53f63e021b289b.1626874164.git.fabioaiuto83@gmail.com


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