flash: complete CONFIG_SYS_NO_FLASH move with renaming

We repeated partial moves for CONFIG_SYS_NO_FLASH, but this is
not completed. Finish this work by the tool.

During this move, let's rename it to CONFIG_MTD_NOR_FLASH.
Actually, we have more instances of "#ifndef CONFIG_SYS_NO_FLASH"
than those of "#ifdef CONFIG_SYS_NO_FLASH".  Flipping the logic will
make the code more readable.  Besides, negative meaning symbols do
not fit in obj-$(CONFIG_...) style Makefiles.

This commit was created as follows:

[1] Edit "default n" to "default y" in the config entry in
    common/Kconfig.

[2] Run "tools/moveconfig.py -y -r HEAD SYS_NO_FLASH"

[3] Rename the instances in defconfigs by the following:
  find . -path './configs/*_defconfig' | xargs sed -i \
  -e '/CONFIG_SYS_NO_FLASH=y/d' \
  -e 's/# CONFIG_SYS_NO_FLASH is not set/CONFIG_MTD_NOR_FLASH=y/'

[4] Change the conditionals by the following:
  find . -name '*.[ch]' | xargs sed -i \
  -e 's/ifndef CONFIG_SYS_NO_FLASH/ifdef CONFIG_MTD_NOR_FLASH/' \
  -e 's/ifdef CONFIG_SYS_NO_FLASH/ifndef CONFIG_MTD_NOR_FLASH/' \
  -e 's/!defined(CONFIG_SYS_NO_FLASH)/defined(CONFIG_MTD_NOR_FLASH)/' \
  -e 's/defined(CONFIG_SYS_NO_FLASH)/!defined(CONFIG_MTD_NOR_FLASH)/'

[5] Modify the following manually
  - Rename the rest of instances
  - Remove the description from README
  - Create the new Kconfig entry in drivers/mtd/Kconfig
  - Remove the old Kconfig entry from common/Kconfig
  - Remove the garbage comments from include/configs/*.h

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/include/configs/zynq-common.h b/include/configs/zynq-common.h
index 8e9d3c4..431d6c4 100644
--- a/include/configs/zynq-common.h
+++ b/include/configs/zynq-common.h
@@ -60,7 +60,7 @@
 #endif
 
 /* NOR */
-#ifndef CONFIG_SYS_NO_FLASH
+#ifdef CONFIG_MTD_NOR_FLASH
 # define CONFIG_SYS_FLASH_BASE		0xE2000000
 # define CONFIG_SYS_FLASH_SIZE		(16 * 1024 * 1024)
 # define CONFIG_SYS_MAX_FLASH_BANKS	1
@@ -162,13 +162,13 @@
 
 /* Environment */
 #ifndef CONFIG_ENV_IS_NOWHERE
-# ifndef CONFIG_SYS_NO_FLASH
+# ifdef CONFIG_MTD_NOR_FLASH
 /* Environment in NOR flash */
 #  define CONFIG_ENV_IS_IN_FLASH
 # elif defined(CONFIG_ZYNQ_QSPI)
 /* Environment in Serial Flash */
 #  define CONFIG_ENV_IS_IN_SPI_FLASH
-# elif defined(CONFIG_SYS_NO_FLASH)
+# elif !defined(CONFIG_MTD_NOR_FLASH)
 #  define CONFIG_ENV_IS_NOWHERE
 # endif