rockchip: rk3288-firefly: Drop unused SPL_LED related code

The firefly-rk3288_defconfig build target does not enable the SPL_LED
Kconfig option.

Drop the unused SPL_LED related code and replace it with a default-state
prop to ensure the LED driver enable the LED at U-Boot proper phase.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
4 files changed