wifi: ath10k: remove gpio number assignment

wifi: ath10k: remove gpio number assignment

The leds-gpio traditionally takes a global gpio number in its platform
data, but the number assigned here is not actually such a number but
only meant to be used internally to this driver.

As part of the kernel-wide cleanup of the old gpiolib interfaces, the
'gpio' number field is going away, so to keep ath10k building, move
the assignment into a private structure instead.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Baochen Qiang <baochen.qiang@oss.qualcomm.com>
Link: https://patch.msgid.link/20250808151822.536879-17-arnd@kernel.org
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>