staging: rtl8188eu: Rename hal_EfusePowerSwitch_RTL8188E()

Rename hal_EfusePowerSwitch_RTL8188E() to rtl8188e_EfusePowerSwitch() and
remove original rtl8188e_EfusePowerSwitch(), so that driver can call
hal_EfusePowerSwitch_RTL8188E() directly without going through
rtl8188e_EfusePowerSwitch().

Signed-off-by: navin patidar <navin.patidar@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>