zephyr/boards: Add nrf9151dk board configuration.

Add support for the nrf9151dk.  This DK has a GD25WB256 32mb external QSPI
flash chip.

Signed-off-by: Patrick Joy <[email protected]>

Author: ThinkTransit

ports/zephyr/boards/nrf9151dk_nrf9151.conf

@@ -0,0 +1,7 @@
+# Enable external flash
+CONFIG_SPI=y
+CONFIG_SPI_NOR=y
+CONFIG_SPI_NOR_SFDP_DEVICETREE=y
+
+CONFIG_FLASH=y
+CONFIG_FLASH_MAP=y

ports/zephyr/boards/nrf9151dk_nrf9151.overlay

@@ -0,0 +1,22 @@
+/ {
+	/* Configure partition manager to use gd25wb256 as the external flash */
+	chosen {
+		nordic,pm-ext-flash = &gd25wb256;
+	};
+};
+
+/delete-node/ &storage_partition;
+
+&gd25wb256 {
+	status = "okay";
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		storage_partition: partition@0 {
+			reg = <0x00000000 0x2000000>;
+			label = "storage";
+		};
+	};
+};