net: usb: rtl8150 fix unintiatilzed variables in rtl8150_get_link_ksettings

[ Upstream commit fba38398 ]

This functions retrieves values by passing a pointer. As the function
that retrieves them can fail before touching the pointers, the variables
must be initialized.

Fixes: 1da177e4

 ("Linux-2.6.12-rc2")
Reported-by:  <syzbot+5186630949e3c55f0799@syzkaller.appspotmail.com>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
Link: https://lore.kernel.org/r/20240619132816.11526-1-oneukum@suse.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>