uboot-phytec

rockchip: convert to use ROCKCHIP_BOOT_MODE_REG for fastboot tag

The fastboot_set_reboot_flag() update a TAG into a register
for next boot, use the common macro for the register so that
we can re-use the function for different SoCs.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>