soc/mediatek: Remove unused variables

The PMIC wrapper driver adds a couple of variables that are never used.
Remove them to avoid build warnings.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c b/drivers/soc/mediatek/mtk-pmic-wrap.c
index 4a38506..db5be1e 100644
--- a/drivers/soc/mediatek/mtk-pmic-wrap.c
+++ b/drivers/soc/mediatek/mtk-pmic-wrap.c
@@ -563,8 +563,6 @@
 
 static int pwrap_init_reg_clock(struct pmic_wrapper *wrp)
 {
-	u32 wdata;
-	u32 rdata;
 	unsigned long rate_spi;
 	int ck_mhz;