boards: arm64: intel_socfpga_agilex_socdk: move to HWMv2

Move and convert to HWMv2 `intel_socfpga_agilex_socdk`
board configuration.

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

boards/boards_legacy/arm64/intel_socfpga_agilex_socdk/Kconfig.board

@@ -1,6 +0,0 @@
-# Copyright (c) 2021 Intel Corporation
-# SPDX-License-Identifier: Apache-2.0
-
-config BOARD_INTEL_SOCFPGA_AGILEX_SOCDK
-	bool "Intel SoC FPGA Development Kit (Agilex)"
-	depends on SOC_AGILEX

boards/boards_legacy/arm64/intel_socfpga_agilex_socdk/Kconfig.defconfig

@@ -1,6 +0,0 @@
-# Copyright (c) 2021 Intel Corporation
-# SPDX-License-Identifier: Apache-2.0
-
-config BOARD
-	default "intel_socfpga_agilex_socdk"
-	depends on BOARD_INTEL_SOCFPGA_AGILEX_SOCDK

boards/intel/intel_socfpga_agilex_socdk/Kconfig.intel_socfpga_agilex_socdk

@@ -0,0 +1,7 @@
+# Copyright (c) 2021-2024 Intel Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_INTEL_SOCFPGA_AGILEX_SOCDK
+	select SOC_AGILEX
+	help
+	  Intel SoC FPGA Development Kit (Agilex)

boards/intel/intel_socfpga_agilex_socdk/board.yml

@@ -0,0 +1,4 @@
+board:
+  name: intel_socfpga_agilex_socdk
+  socs:
+    - name: intel_socfpga_agilex

boards/intel/intel_socfpga_agilex_socdk/doc/index.rst

@@ -42,7 +42,7 @@ Other hardware features have not been enabled yet for this board.
 
 The default configuration can be found in the defconfig file:
 
-        ``boards/arm64/intel_socfpga_agilex_socdk/intel_socfpga_agilex_socdk_defconfig``
+        ``boards/intel/intel_socfpga_agilex_socdk/intel_socfpga_agilex_socdk_defconfig``
 
 Programming and Debugging
 *************************

boards/intel/intel_socfpga_agilex_socdk/intel_socfpga_agilex_socdk_defconfig

@@ -1,13 +1,10 @@
-# Copyright (c) 2021 Intel Corporation
+# Copyright (c) 2021-2024 Intel Corporation
 # SPDX-License-Identifier: Apache-2.0
 
 # The Zephyr build from this defconfig is expected to boot from
 # Intel Arm Trusted Firmware (ATF)
 # Boot Flow: BL21 -> BL31 -> Zephyr
 
-CONFIG_SOC_SERIES_AGILEX=y
-CONFIG_SOC_AGILEX=y
-CONFIG_BOARD_INTEL_SOCFPGA_AGILEX_SOCDK=y
 CONFIG_ARM_ARCH_TIMER=y
 
 # Serial Drivers