sata: Move drivers into new drivers/ata directory

At present we have the SATA and PATA drivers mixed up in the drivers/block
directory. It is better to split them out into their own place. Use
drivers/ata which is what Linux does.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/drivers/Kconfig b/drivers/Kconfig
index a736386..63e4034 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -6,6 +6,8 @@
 
 source "drivers/adc/Kconfig"
 
+source "drivers/ata/Kconfig"
+
 source "drivers/block/Kconfig"
 
 source "drivers/clk/Kconfig"