staging: et131x: et131x.c: sparse warning of incompatible types

fixed sparse warning:   incompatible types in comparison expression
			(different address spaces)

wolw and reg both are being used only for the initialization of
the __iomem area.
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/et131x/et131x.c

@@ -1135,7 +1135,7 @@ static void et1310_config_rxmac_regs(struct et131x_adapter *adapter)
 	u32 sa_lo;
 	u32 sa_hi = 0;
 	u32 pf_ctrl = 0;
-	u32 *wolw;
+	u32 __iomem *wolw;
 
 	/* Disable the MAC while it is being configured (also disable WOL) */
 	writel(0x8, &rxmac->ctrl);
@@ -1255,7 +1255,7 @@ static void et1310_config_txmac_regs(struct et131x_adapter *adapter)
 static void et1310_config_macstat_regs(struct et131x_adapter *adapter)
 {
 	struct macstat_regs __iomem *macstat = &adapter->regs->macstat;
-	u32 *reg;
+	u32 __iomem *reg;
 
 	/* initialize all the macstat registers to zero on the device  */
 	for (reg = &macstat->txrx_0_64_byte_frames;