soc: arm: intel_socfpga_std: Align board subdirectory

Aligh board directory to other Intel FPGA boards moving
`boards/intel/cyclonev_socdk` -->
`boards/intel/intel_socfpga_std/cyclonev_socdk`

Signed-off-by: Dmitrii Golovanov <dmitrii.golovanov@intel.com>

boards/intel/intel_socfpga_std/cyclonev_socdk/doc/index.rst

@@ -169,7 +169,7 @@ application.
 ``Important!!!`` : Before flashing the board a ``preloader`` is required,
 you can download `cv_soc_devkit_ghrd.tar.gz <https://releases.rocketboards.org/release/2018.05/gsrd/hw/cv_soc_devkit_ghrd.tar.gz>`_,
 extract the file and copy ``cv_soc_devkit_ghrd/software/preloader/uboot-socfpga/spl/u-boot-spl``
-to ``boards/intel/cyclonev_socdk/support/``
+to ``boards/intel/intel_socfpga_std/cyclonev_socdk/support/``
 
 .. zephyr-app-commands::
    :zephyr-app: samples/hello_world
@@ -184,7 +184,7 @@ using the customized OpenOCD runner script :zephyr_file:`scripts/west_commands/r
 After it completes the kernel will immediately boot using the GSRD preloader.
 Notice that there a lot of helper files to ``flash`` the application with
 OpenOCD and GDB Debbuger (Zephyr SDK must be installed in your machine).
-This files should be located in :zephyr_file:`boards/intel/cyclonev_socdk/support/` including:
+This files should be located in :zephyr_file:`boards/intel/intel_socfpga_std/cyclonev_socdk/support/` including:
 
 * blaster_6810.hex : USB-BlasterII firmware
 * tmp_preloader_dl_cmd.txt : GDB helper file to load the preloader
@@ -294,7 +294,7 @@ You will see output similar to the following:
    warning: No executable has been specified and target does not support
    determining executable automatically.  Try using the "file" command.
    0xffff147c in ?? ()
-   warning: /home/demo/zephyrproject/zephyr/boards/intel/cyclonev_socdk/support/tmp_appli_debug_cmd.gdb: No such file or directory
+   warning: /home/demo/zephyrproject/zephyr/boards/intel/intel_socfpga_std/cyclonev_socdk/support/tmp_appli_debug_cmd.gdb: No such file or directory
    [Inferior 1 (Remote target) detached]
    Info : dropped 'gdb' connection
    shutdown command invoked

boards/intel/intel_socfpga_std/cyclonev_socdk/support/download_all.gdb

@@ -7,7 +7,7 @@ set confirm off
 set pagination off
 
 #Download and Run preloader
-source boards/intel/cyclonev_socdk/support/preloader_dl_cmd.txt
+source boards/intel/intel_socfpga_std/cyclonev_socdk/support/preloader_dl_cmd.txt
 
 #Stop watchdog timer
 #permodrst Reg , reset watch dog timer

boards/intel/intel_socfpga_std/cyclonev_socdk/support/preloader_dl_cmd.txt

@@ -3,7 +3,7 @@
 # Description:
 # Helper file to download the GSRD preloader to the board before the application
 
-restore boards/intel/cyclonev_socdk/support/u-boot-spl
-symbol-file -readnow boards/intel/cyclonev_socdk/support/u-boot-spl
+restore boards/intel/intel_socfpga_std/cyclonev_socdk/support/u-boot-spl
+symbol-file -readnow boards/intel/intel_socfpga_std/cyclonev_socdk/support/u-boot-spl
 thbreak spl_boot_device
 jump _start