usb: ucsi: huawei_gaokun: move typec_altmode off stack

usb: ucsi: huawei_gaokun: move typec_altmode off stack

The typec_altmode structure contains a 'struct device' object
that cannot be allocated on the stack because of its size, even
when ignoring the lifetime rules:

drivers/usb/typec/ucsi/ucsi_huawei_gaokun.c:326:13: error: stack frame size (1456) exceeds limit (1280) in 'gaokun_ucsi_usb_notify_ind' [-Werror,-Wframe-larger-than]
  326 | static void gaokun_ucsi_usb_notify_ind(struct gaokun_ucsi *uec)

Since the altmode is always associated with a port here, move
it into the port object and avoid at least the stack allocation
issue.

Fixes: 1c2b66a7d725 ("usb: ucsi: huawei_gaokun: support mode switching")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Pengyu Luo <mitltlatltl@gmail.com>
Link: https://patch.msgid.link/20260618143341.1900221-1-arnd@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>