mtd: spi-nor-ids: Add XTX XT25F128B

Adds support for XT25F128B used on Odroid Go Advance. Unfortunately
this chip uses a continuation code which I cannot seem to parse, so
there are possibly going to be collisions with chips that use the same
manufacturer/ID.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Signed-off-by: Jon Lin <jon.lin@rock-chips.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/drivers/mtd/spi/Kconfig b/drivers/mtd/spi/Kconfig
index 1b2ef37..b2291f7 100644
--- a/drivers/mtd/spi/Kconfig
+++ b/drivers/mtd/spi/Kconfig
@@ -204,6 +204,12 @@
 	  Add support for various XMC (Wuhan Xinxin Semiconductor
 	  Manufacturing Corp.) SPI flash chips (XM25xxx)
 
+config SPI_FLASH_XTX
+	bool "XTX SPI flash support"
+	help
+	  Add support for various XTX (XTX Technology Limited)
+	  SPI flash chips (XT25xxx).
+
 endif
 
 config SPI_FLASH_USE_4K_SECTORS