ata: Migrate CONFIG_SATA_MV to Kconfig

Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 77e0fbb..8dfa467 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -47,6 +47,12 @@
 	  Enable this driver to support Sata devices through
 	  Synopsys DWC AHCI module.
 
+config SATA_MV
+	bool "Enable Marvell SATA controller driver support"
+	help
+	  Enable this driver to support the SATA controller found in
+	  some Marvell SoCs.
+
 config SATA_SIL
 	bool "Enable Silicon Image SIL3131 / SIL3132 / SIL3124 SATA driver support"
 	help