arm: dts: arria10: Update dtsi/dts from Linux

Update these 3 files from Linux:.
- socfpga_arria10.dtsi (Commit ID c1459a9d7e92)
- socfpga_arria10_socdk.dtsi (Commit ID d9b9f805ee2b)
- socfpga_arria10_socdk_sdmmc.dts (Commit ID 17808d445b6f)

Change in socfpga_arria10.dtsi:
- Add clkmgr label, so that can reference to it in u-boot.dtsi.

Change in socfpga_arria10-u-boot.dtsi:
- Add compatible and altr,sysmgr-syscon for uboot.

Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>