staging: vt6655: Cleanup and rename function MACbSafeSoftwareReset

staging: vt6655: Cleanup and rename function MACbSafeSoftwareReset

Rename function MACbSafeSoftwareReset to vt6655_mac_save_soft_reset and
abyTmpRegData to tmp_reg_data to avoid CamelCase which is not accepted by
checkpatch.pl. Remove return value bRetVal as it is unused by the calling
functions. Remove unnecessary declaration of function and make function
static. Change declaration of tmp_reg_data to shorten code.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/540a684266610f7618b3ef6000d4699d065c8e6f.1662890990.git.philipp.g.hortmann@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>