Fix console output in real mode int10 implementation.

Checking RBIL, int10 AH=0x10 does never output a character.
The two output functions are AH=0x09 and AH=0x0e.

Change-Id: Id7f4d260b63024748ef771f949e8b60f934bacbc
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/483
Tested-by: build bot (Jenkins)
Reviewed-by: Rudolf Marek <r.marek@assembler.cz>

src/devices/oprom/x86_interrupts.c

@@ -70,7 +70,7 @@ int int10_handler(struct eregs *regs)
 		res = 0;
 		break;
 	case 0x09: // Write Character and attribute
-	case 0x10: // Write Character
+	case 0x0e: // Write Character
 		printk(BIOS_INFO, "%c", regs->eax & 0xff);
 		res = 0;
 		break;