rockchip: rk3399: fix SPI-NOR flash not found in U-Boot pre-reloc

In commit 100f489f ("rockchip: rk3399: Fix loading FIT from SD-card
when booting from eMMC"), the spi1 bootph properties were mistakenly
removed meaning, so re-add them back to fix SPI-NOR flash not being
found in U-Boot pre-reloc as required for RK3399 Puma.

Fixes: 100f489f ("rockchip: rk3399: Fix loading FIT from SD-card when booting from eMMC")
Signed-off-by: Quentin Schulz <quentin.schulz@cherry.de>
Reviewed-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>