brcm: Add nvram for the Chuwi Hi8 (CWI509) tablet

Add a NVRAM file for the brcmfmac43430a0 wifi/bit chip found on the
Chuw Hi8 (CWI509) tablet. This is based on copy of the existing
brcm/brcmfmac43430a0-sdio.jumper-ezpad-mini3.txt NVRAM file with some
the calibration values adjusted for the Chuwi Hi8 tablet.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Josh Boyer <jwboyer@kernel.org>