sf: probe: Hex values are in lower case

All other hex values in sf_probe.c are in lower case so we should
fix this one too.

Signed-off-by: Luka Perkov <luka@openwrt.org>
Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>

drivers/mtd/spi/sf_probe.c

@@ -67,7 +67,7 @@ static const struct spi_flash_params spi_flash_params_table[] = {
 	{"MX25L6405D",	   0xc22017, 0x0,	64 * 1024,   128,	             0},
 	{"MX25L12805",	   0xc22018, 0x0,	64 * 1024,   256,	             0},
 	{"MX25L25635F",	   0xc22019, 0x0,	64 * 1024,   512,	             0},
-	{"MX25L51235F",	   0xc2201A, 0x0,	64 * 1024,  1024,	             0},
+	{"MX25L51235F",	   0xc2201a, 0x0,	64 * 1024,  1024,	             0},
 	{"MX25L12855E",	   0xc22618, 0x0,	64 * 1024,   256,	             0},
 #endif
 #ifdef CONFIG_SPI_FLASH_SPANSION	/* SPANSION */