Add support for Winbond W25X05CL

This commit adds support for the Winbond W25X05CL SPI flash chip.  The
Winbond W25X05CL is a 512Kib (64 KiB) SPI flash chip with 4KiB sectors.
I have tested this patch with a Bus Pirate (v3b) and an in-circuit W25X05CL
flash chip using a test clip. Reading, erasing, and writing all function
as expected.

Change-Id: I19c33c7da374f0263f30577a10a0f0f1afa4febc
Signed-off-by: Jacob Appelbaum <jacob@appelbaum.net>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/43573
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

flashchips.c

@@ -17327,6 +17327,38 @@ const struct flashchip flashchips[] = {
 		.voltage	= {1650, 1950}, /* Fast read (0x0B) and multi I/O supported */
 	},
 
+	{
+		.vendor		= "Winbond",
+		.name		= "W25X05",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= WINBOND_NEX_ID,
+		.model_id	= WINBOND_NEX_W25X05,
+		.total_size	= 64,
+		.page_size	= 256,
+		.feature_bits	= FEATURE_WRSR_WREN,
+		.tested		= TEST_OK_PREW,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 16} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {32 * 1024, 2} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { {64 * 1024, 1} },
+				.block_erase = spi_block_erase_d8,
+			}
+		},
+		.printlock	= spi_prettyprint_status_register_plain,
+		.unlock		= spi_disable_blockprotect,
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read,
+		.voltage	= {2300, 3600},
+	},
+
 	{
 		.vendor		= "Winbond",
 		.name		= "W25X10",

flashchips.h

@@ -917,6 +917,7 @@
 #define WINBOND_NEX_W25P80	0x2014
 #define WINBOND_NEX_W25P16	0x2015
 #define WINBOND_NEX_W25P32	0x2016
+#define WINBOND_NEX_W25X05	0x3010 /* W25X05CL */
 #define WINBOND_NEX_W25X10	0x3011
 #define WINBOND_NEX_W25X20	0x3012
 #define WINBOND_NEX_W25X40	0x3013