ARM: davinci: re-use %*ph specifier

%*ph specifier allows to dump data in hex format using the pointer
to a buffer. This is suitable to use here.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

arch/arm/mach-davinci/board-dm644x-evm.c

@@ -546,9 +546,7 @@ static int dm6444evm_msp430_get_pins(void)
 	if (status < 0)
 		return status;
 
-	dev_dbg(&dm6446evm_msp->dev,
-		"PINS: %02x %02x %02x %02x\n",
-		buf[0], buf[1], buf[2], buf[3]);
+	dev_dbg(&dm6446evm_msp->dev, "PINS: %4ph\n", buf);
 
 	return (buf[3] << 8) | buf[2];
 }