[Skiboot] hmi: Remove unused variable in opal_handle_hmi()

[Michael Neuling]

rc is only used once in opal_handle_hmi(), so let's remove it.

Signed-off-by: Michael Neuling <mikey at neuling.org>

diff --git a/core/hmi.c b/core/hmi.c
index 0b9c7fb..cbd35e6 100644
--- a/core/hmi.c
+++ b/core/hmi.c
@@ -704,7 +704,6 @@ int handle_hmi_exception(uint64_t hmer, struct OpalHMIEvent *hmi_evt)
 static int64_t opal_handle_hmi(void)
 {
 	uint64_t hmer;
-	int rc = OPAL_SUCCESS;
 	struct OpalHMIEvent hmi_evt;
 
 	/*
@@ -719,6 +718,6 @@ static int64_t opal_handle_hmi(void)
 	hmer = mfspr(SPR_HMER);		/* Get HMER register value */
 	handle_hmi_exception(hmer, &hmi_evt);
 
-	return rc;
+	return OPAL_SUCCESS;
 }
 opal_call(OPAL_HANDLE_HMI, opal_handle_hmi, 0);