rockchip: LinkEase EasePi R1 use dedicated uboot

Fixes the "mdio_bus stmmac-1: MDIO device at address 1 is missing" error
that occurs during cold boot when initializing GMAC.

Fixes: 8ca4caacd039 ("rockchip: Add support for RK3568 LinkEase EasePi R1")
Signed-off-by: Liangbin Lian <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/20772
Signed-off-by: Hauke Mehrtens <[email protected]>

target/linux/rockchip/image/armv8.mk

@@ -184,7 +184,6 @@ define Device/linkease_easepi-r1
   $(Device/rk3568)
   DEVICE_VENDOR := LinkEase
   DEVICE_MODEL := EasePi R1
-  UBOOT_DEVICE_NAME := generic-rk3568
   DEVICE_PACKAGES := blkdiscard block-mount kmod-button-hotplug kmod-nvme kmod-r8169
 endef
 TARGET_DEVICES += linkease_easepi-r1