wl12xx: move hardcoded hci_io_ds value into the conf struct

Instead of hardcoding the hci_io_ds configuration that we write to the
SDIO_IO_DS top registed, read it from the default configuration so
that it's easier to change for different platforms.

Reported-by: Ido Yariv <ido@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
diff --git a/drivers/net/wireless/wl12xx/boot.h b/drivers/net/wireless/wl12xx/boot.h
index d9de64a..e8f8255 100644
--- a/drivers/net/wireless/wl12xx/boot.h
+++ b/drivers/net/wireless/wl12xx/boot.h
@@ -117,10 +117,13 @@
 #define SDIO_IO_DS                   0xd14
 
 /* SDIO/wSPI DS configuration values */
-#define HCI_IO_DS_8MA                0
-#define HCI_IO_DS_4MA                1 /* default */
-#define HCI_IO_DS_6MA                2
-#define HCI_IO_DS_2MA                3
+enum {
+	HCI_IO_DS_8MA = 0,
+	HCI_IO_DS_4MA = 1, /* default */
+	HCI_IO_DS_6MA = 2,
+	HCI_IO_DS_2MA = 3,
+};
+
 /* end PLL configuration algorithm for wl128x */
 
 #endif