mtd: spi-nor: Rename SPI_ADVANCE to SPI_STACKED_PARALLEL

The SPI_ADVANCE description does not explain what the switch does.
It does not have anything to do with any advanced functionality, it
only gates off support for stacked and parallel SPI NORs. Rename the
Kconfig symbol, update description, and move it right next to Xilinx
hardware as it seems to be specific to this hardware. Make sure the
symbol is also protected by if DM_SPI in Kconfig.

Fixes: 5d40b3d384dc ("mtd: spi-nor: Add parallel and stacked memories support")
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index fa817ec..fd5cb36 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -20,12 +20,6 @@
 
 if SPI
 
-config SPI_ADVANCE
-	bool "Enable the advance feature"
-	help
-	 Enable the SPI advance feature support. By default this is disabled.
-	 If you intend to use the advance feature support you should enable.
-
 config DM_SPI
 	bool "Enable Driver Model for SPI drivers"
 	depends on DM
@@ -615,6 +609,12 @@
 	  This option is used to enable ZynqMP QSPI controller driver which
 	  is used to communicate with qspi flash devices.
 
+config SPI_STACKED_PARALLEL
+	bool "Enable support for stacked or parallel memories"
+	help
+	 Enable support for stacked/or parallel memories. This functionality
+	 may appear on Xilinx hardware. By default this is disabled.
+
 endif # if DM_SPI
 
 config FSL_ESPI