rockchip: rk3399: Fix loading FIT from SD-card when booting from eMMC

rockchip: rk3399: Fix loading FIT from SD-card when booting from eMMC

When RK3399 boards run SPL from eMMC and fail to load FIT from eMMC due
to it being missing or checksum validation fails there can be a fallback
to read FIT from SD-card. However, without proper pinctrl configuration
reading FIT from SD-card may fail:

  U-Boot SPL 2024.04-rc4 (Mar 17 2024 - 22:54:45 +0000)
  Trying to boot from MMC2
  mmc_load_image_raw_sector: mmc block read error
  Trying to boot from MMC2
  mmc_load_image_raw_sector: mmc block read error
  Trying to boot from MMC1
  Card did not respond to voltage select! : -110
  mmc_init: -95, time 12
  spl: mmc init failed with error: -95
  SPL: failed to boot from all boot devices (err=-6)
  ### ERROR ### Please RESET the board ###

Fix this by tagging related sdhci, sdmmc and spi flash pinctrl nodes
with bootph props. Also move bootph for common nodes shared by all
boards to the SoC u-boot.dtsi.

eMMC, SD-Card and SPI flash nodes are also changed to only be tagged
with bootph props for SPL and U-Boot pre-reloc phases.

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