staging: gdm724x: emove redundant initialization of variable hci_len

The variable hci_len is being initialized with a value that is never
read and it is being updated later with a new value. The initialization
is redundant and can be removed.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Addresses-Coverity: ("Unused value")
Link: https://lore.kernel.org/r/20210609120617.185975-1-colin.king@canonical.com


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