boards: riscv: niosv_g: move and convert to HWMv2

Move and convert to HWMv2 riscv/niosv_g board configuration.

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

boards/boards_legacy/riscv/niosv_g/Kconfig.board

@@ -1,6 +0,0 @@
-# Copyright (C) 2023, Intel Corporation
-# SPDX-License-Identifier: Apache-2.0
-
-config BOARD_NIOSV_G
-	bool "Intel FPGA Nios V/g General Purpose Processor"
-	depends on SOC_NIOSV_G

boards/boards_legacy/riscv/niosv_g/Kconfig.defconfig

@@ -1,9 +0,0 @@
-# Copyright (C) 2023, Intel Corporation
-# SPDX-License-Identifier: Apache-2.0
-
-if BOARD_NIOSV_G
-
-config BOARD
-	default "niosv_g"
-
-endif # BOARD_NIOSV_G

boards/intel/niosv_g/Kconfig.niosv_g

@@ -0,0 +1,8 @@
+# Copyright (C) 2023-2024, Intel Corporation
+#
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_NIOSV_G
+	select SOC_NIOSV_G
+	help
+	  Intel FPGA Nios V/g General Purpose Processor

boards/intel/niosv_g/board.yml

@@ -0,0 +1,4 @@
+board:
+  name: niosv_g
+  socs:
+    - name: niosv_g

boards/intel/niosv_g/niosv_g_defconfig

@@ -1,9 +1,7 @@
-# Copyright (C) 2023, Intel Corporation
+# Copyright (C) 2023-2024, Intel Corporation
+#
 # SPDX-License-Identifier: Apache-2.0
 
-CONFIG_SOC_SERIES_NIOSV=y
-CONFIG_SOC_NIOSV_G=y
-CONFIG_BOARD_NIOSV_G=y
 CONFIG_CONSOLE=y
 CONFIG_PRINTK=y
 CONFIG_SERIAL=y