staging: vt6655: Create one function for two macros

Create function vt6655_mac_set_bits with two parameters to cover
functionality of two macros.
Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/78883f42b2df258dbf821d7f7515a82932a157f1.1659892670.git.philipp.g.hortmann@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6655/device_main.c

@@ -216,15 +216,20 @@ static void vt6655_mac_dma_ctl(void __iomem *iobase, u8 reg_index)
 		iowrite32(DMACTL_RUN, iobase + reg_index);
 }
 
-static void MACvEnableProtectMD(void __iomem *iobase)
+static void vt6655_mac_set_bits(void __iomem *iobase, u32 mask)
 {
 	u32 reg_value;
 
 	reg_value = ioread32(iobase + MAC_REG_ENCFG);
-	reg_value = reg_value | ENCFG_PROTECTMD;
+	reg_value = reg_value | mask;
 	iowrite32(reg_value, iobase + MAC_REG_ENCFG);
 }
 
+static void MACvEnableProtectMD(void __iomem *iobase)
+{
+	vt6655_mac_set_bits(iobase, ENCFG_PROTECTMD);
+}
+
 /*
  * Initialisation of MAC & BBP registers
  */