i2c: Move at24 to drivers/misc/eeprom

As drivers/i2c/chips is going to go away, move the driver to
drivers/misc/eeprom. Other eeprom drivers may be moved here later, too.
Update Kconfig text to specify this driver as I2C.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/drivers/misc/eeprom/Makefile b/drivers/misc/eeprom/Makefile
new file mode 100644
index 0000000..72cd478
--- /dev/null
+++ b/drivers/misc/eeprom/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_AT24)		+= at24.o