media: ttpci: improve printing of encoded MAC address

When loading the budget_av driver for ie. a KNC1 DVB-C TDA10024 card,
which makes use of the ttpci eeprom check functionality (that always
fails on these cards, but that's no issue at all), this is printed
to the kernel log:

  [   10.497333] saa7146 (0): dma buffer size 192512
  [   10.497335] dvbdev: DVB: registering new adapter (KNC1 DVB-C TDA10024)
  [   10.545007] adapter failed MAC signature check
  [   10.545009] encoded MAC from EEPROM was
  [   10.545010] ff:
  [   10.545011] ff:
  [   10.545011] ff:
  ...
  [   10.545021] ff
  [   10.832422] budget_av: KNC1-4: MAC addr = 00:09:d6:6d:b3:be

with the 'ff' being repeated for a total of 20 times. Improve that by
using the %*phC format specifier instead dprintk()'ing every byte of the
encoded MAC separately. This obsoletes the int i, and the kernel log
looks cleaner:

  [ 3234.383153] saa7146 (0): dma buffer size 192512
  [ 3234.383154] dvbdev: DVB: registering new adapter (KNC1 DVB-C TDA10024)
  [ 3234.428745] adapter failed MAC signature check
  [ 3234.428747] encoded MAC from EEPROM was ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff
  [ 3234.728194] budget_av: KNC1-0: MAC addr = 00:09:d6:6d:b3:be

Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/pci/ttpci/ttpci-eeprom.c

@@ -138,7 +138,7 @@ static int ttpci_eeprom_read_encodedMAC(struct i2c_adapter *adapter, u8 * encode
 
 int ttpci_eeprom_parse_mac(struct i2c_adapter *adapter, u8 *proposed_mac)
 {
-	int ret, i;
+	int ret;
 	u8 encodedMAC[20];
 	u8 decodedMAC[6];
 
@@ -153,11 +153,8 @@ int ttpci_eeprom_parse_mac(struct i2c_adapter *adapter, u8 *proposed_mac)
 	ret = getmac_tt(decodedMAC, encodedMAC);
 	if( ret != 0 ) {
 		dprintk("adapter failed MAC signature check\n");
-		dprintk("encoded MAC from EEPROM was " );
-		for(i=0; i<19; i++) {
-			dprintk( "%.2x:", encodedMAC[i]);
-		}
-		dprintk("%.2x\n", encodedMAC[19]);
+		dprintk("encoded MAC from EEPROM was %*phC",
+			(int)sizeof(encodedMAC), &encodedMAC);
 		eth_zero_addr(proposed_mac);
 		return ret;
 	}