mtd: move NAND files into a raw/ subdirectory

NAND flavors, like serial and parallel, have a lot in common and would
benefit to share code. Let's move raw (parallel) NAND specific code in a
raw/ subdirectory, to ease the addition of a core file in nand/ and the
introduction of a spi/ subdirectory specific to SPI NANDs.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
diff --git a/doc/README.SPL b/doc/README.SPL
index 3ba313c..fc1ca1a 100644
--- a/doc/README.SPL
+++ b/doc/README.SPL
@@ -57,11 +57,11 @@
 CONFIG_SPL_EXT_SUPPORT
 CONFIG_SPL_LIBGENERIC_SUPPORT (lib/libgeneric.o)
 CONFIG_SPL_POWER_SUPPORT (drivers/power/libpower.o)
-CONFIG_SPL_NAND_SUPPORT (drivers/mtd/nand/libnand.o)
+CONFIG_SPL_NAND_SUPPORT (drivers/mtd/nand/raw/libnand.o)
 CONFIG_SPL_DRIVERS_MISC_SUPPORT (drivers/misc)
 CONFIG_SPL_DMA_SUPPORT (drivers/dma/libdma.o)
 CONFIG_SPL_POST_MEM_SUPPORT (post/drivers/memory.o)
-CONFIG_SPL_NAND_LOAD (drivers/mtd/nand/nand_spl_load.o)
+CONFIG_SPL_NAND_LOAD (drivers/mtd/nand/raw/nand_spl_load.o)
 CONFIG_SPL_SPI_LOAD (drivers/mtd/spi/spi_spl_load.o)
 CONFIG_SPL_RAM_DEVICE (common/spl/spl.c)
 CONFIG_SPL_WATCHDOG_SUPPORT (drivers/watchdog/libwatchdog.o)
diff --git a/doc/README.arm-relocation b/doc/README.arm-relocation
index 645b374..d2a7e81 100644
--- a/doc/README.arm-relocation
+++ b/doc/README.arm-relocation
@@ -84,7 +84,7 @@
 - cpu copies the first page from NAND to 0xbb000000 (IMX_NFC_BASE)
   and start with code execution on this address.
 
-- The First page contains u-boot code from drivers/mtd/nand/mxc_nand_spl.c
+- The First page contains u-boot code from drivers/mtd/nand/raw/mxc_nand_spl.c
   which inits the dram, cpu registers, reloacte itself to CONFIG_SPL_TEXT_BASE	and loads
   the "real" u-boot to CONFIG_SYS_NAND_U_BOOT_DST and starts execution
   @CONFIG_SYS_NAND_U_BOOT_START
diff --git a/doc/README.nand b/doc/README.nand
index cda11b4..ec461b2 100644
--- a/doc/README.nand
+++ b/doc/README.nand
@@ -116,7 +116,7 @@
       The maximum number of NAND chips per device to be supported.
 
    CONFIG_SYS_NAND_SELF_INIT
-      Traditionally, glue code in drivers/mtd/nand/nand.c has driven
+      Traditionally, glue code in drivers/mtd/nand/raw/nand.c has driven
       the initialization process -- it provides the mtd and nand
       structs, calls a board init function for a specific device,
       calls nand_scan(), and registers with mtd.
@@ -125,7 +125,7 @@
       run code between nand_scan_ident() and nand_scan_tail(), or other
       deviations from the "normal" flow.
 
-      If a board defines CONFIG_SYS_NAND_SELF_INIT, drivers/mtd/nand/nand.c
+      If a board defines CONFIG_SYS_NAND_SELF_INIT, drivers/mtd/nand/raw/nand.c
       will make one call to board_nand_init(), with no arguments.  That
       function is responsible for calling a driver init function for
       each NAND device on the board, that performs all initialization
@@ -280,7 +280,7 @@
 =====
 
 The Disk On Chip driver is currently broken and has been for some time.
-There is a driver in drivers/mtd/nand, taken from Linux, that works with
+There is a driver in drivers/mtd/nand/raw, taken from Linux, that works with
 the current NAND system but has not yet been adapted to the u-boot
 environment.
 
diff --git a/doc/README.zynq b/doc/README.zynq
index 5b0672c..da977b2 100644
--- a/doc/README.zynq
+++ b/doc/README.zynq
@@ -63,7 +63,7 @@
   spi - drivers/spi/zynq_spi.c
   qspi - drivers/spi/zynq_qspi.c
   i2c - drivers/i2c/zynq_i2c.c
-  nand - drivers/mtd/nand/zynq_nand.c
+  nand - drivers/mtd/nand/raw/zynq_nand.c
 - Done proper cleanups on board configurations
 - Added basic FDT support for zynq boards
 - d-cache support for zynq_gem.c