meson64: bleedingedge: enable CONFIG_GPIO_CDEV_V1

Linux v7.1 dropped the 'default y' from GPIO_CDEV_V1, the v1 GPIO
character-device ABI used by libgpiod 1.x. That is what virtually all
current userspace ships: every Ubuntu release and Debian up to bookworm
use libgpiod 1.x; only Debian trixie and newer moved to libgpiod 2.x
(v2 ABI). Without this option such images lose all libgpiod GPIO access
(gpioget/gpioset/gpiomon return -EINVAL).

The option is purely additive - the v2 ABI used by libgpiod 2.x stays
available - so enabling it only restores the pre-7.1 behaviour. The
older meson64 branches (6.12/6.18/7.0) still default it to y.

Author: adeepn

config/kernel/linux-meson64-bleedingedge.config

@@ -4019,3 +4019,4 @@ CONFIG_TEST_DYNAMIC_DEBUG=m
 CONFIG_TEST_MEMCAT_P=m
 CONFIG_TEST_FREE_PAGES=m
 CONFIG_MEMTEST=y
+CONFIG_GPIO_CDEV_V1=y