staging: r8188eu: remove HW_VAR_CHK_HI_QUEUE_EMPTY from GetHwReg8188EU()

staging: r8188eu: remove HW_VAR_CHK_HI_QUEUE_EMPTY from GetHwReg8188EU()

The HW_VAR_CHK_HI_QUEUE_EMPTY from GetHwReg8188EU() just calls
rtw_read32(). Remove HW_VAR_CHK_HI_QUEUE_EMPTY from GetHwReg8188EU()
and call rtw_read32() directly. Move the call to a new function to
indicate what it actually does. This is part of the ongoing effort to
get rid of the unwanted hal layer.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20220331130522.6648-4-straube.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>