Kconfig: Add a CONFIG_IDE option

At present IDE support is controlled by CONFIG_CMD_IDE. Add a separate
CONFIG_IDE option so that IDE support can be enabled without requiring
the 'ide' command.

Update existing users and move the ide driver into drivers/block since
it should not be in common/.

Signed-off-by: Simon Glass <sjg@chromium.org>

cmd/Kconfig

@@ -486,6 +486,7 @@ config CMD_DEMO
 
 config CMD_IDE
 	bool "ide - Support for IDE drivers"
+	select IDE
 	help
 	  Provides an 'ide' command which allows accessing the IDE drive,
 	  reseting the IDE interface, printing the partition table and

cmd/pcmcia.c

@@ -83,7 +83,7 @@ U_BOOT_CMD(
 
 #undef	CHECK_IDE_DEVICE
 
-#if defined(CONFIG_CMD_IDE) && defined(CONFIG_IDE_8xx_PCCARD)
+#if defined(CONFIG_IDE) && defined(CONFIG_IDE_8xx_PCCARD)
 #define	CHECK_IDE_DEVICE
 #endif