samples: drivers: spi_flash: add support for the NPCX EVB

This commit adds the support to run the SPI NOR sample code on the
npcx7m6fb_evb and npcx9m6f_evb boards.

Signed-off-by: Jun Lin <[email protected]>
Change-Id: I780c5dfcf53f3ac537da946673fc03f5ee24e90c

Author: ChiHuaL

samples/drivers/spi_flash/boards/npcx7m6fb_evb.conf

@@ -0,0 +1,7 @@
+#
+# Copyright (c) 2021 Nuvoton Technology Corporation.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+CONFIG_SPI_NOR=y

samples/drivers/spi_flash/boards/npcx9m6f_evb.conf

@@ -0,0 +1,7 @@
+#
+# Copyright (c) 2021 Nuvoton Technology Corporation.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+CONFIG_SPI_NOR=y

samples/drivers/spi_flash/src/main.c

@@ -33,6 +33,9 @@
 /* The FPGA bitstream is stored in the lower 536 sectors of the flash. */
 #define FLASH_TEST_REGION_OFFSET \
 	DT_REG_SIZE(DT_NODE_BY_FIXED_PARTITION_LABEL(fpga_bitstream))
+#elif defined(CONFIG_BOARD_NPCX9M6F_EVB) || \
+	defined(CONFIG_BOARD_NPCX7M6FB_EVB)
+#define FLASH_TEST_REGION_OFFSET 0x7F000
 #else
 #define FLASH_TEST_REGION_OFFSET 0xff000
 #endif