powerpc/powernv: Fix mis-merge of OPAL support for LEDS driver

When I merged the OPAL support for the powernv LEDS driver I missed a
hunk.

This is slightly modified from the original patch, as the original added
code to opal-api.h which is not in the skiboot version, which is
discouraged.

Instead those values are moved into the driver, which is the only place
they are used.

Fixes: 8a8d91817aec ("powerpc/powernv: Add OPAL interfaces for accessing and modifying system LED states")
Reviewed-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/drivers/leds/leds-powernv.c b/drivers/leds/leds-powernv.c
index a2fea19..2c5c5b1 100644
--- a/drivers/leds/leds-powernv.c
+++ b/drivers/leds/leds-powernv.c
@@ -27,9 +27,9 @@
 	const char	*desc;
 };
 static const struct led_type_map led_type_map[] = {
-	{OPAL_SLOT_LED_TYPE_ID,		POWERNV_LED_TYPE_IDENTIFY},
-	{OPAL_SLOT_LED_TYPE_FAULT,	POWERNV_LED_TYPE_FAULT},
-	{OPAL_SLOT_LED_TYPE_ATTN,	POWERNV_LED_TYPE_ATTENTION},
+	{OPAL_SLOT_LED_TYPE_ID,		"identify"},
+	{OPAL_SLOT_LED_TYPE_FAULT,	"fault"},
+	{OPAL_SLOT_LED_TYPE_ATTN,	"attention"},
 	{-1,				NULL},
 };