input: add missing newline from trace-events

This was accidentally omitted from 77cb0f5a "Split adb.c into adb.c, adb-mouse.c
and adb-kbd.c".
Signed-off-by: NMark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

hw/input/trace-events

@@ -4,6 +4,7 @@
 adb_kbd_no_key(void) "Ignoring NO_KEY"
 adb_kbd_writereg(int reg, uint8_t val) "reg %d val 0x%2.2x"
 adb_kbd_readreg(int reg, uint8_t val0, uint8_t val1) "reg %d obuf[0] 0x%2.2x obuf[1] 0x%2.2x"
+
 # hw/input/adb-mouse.c
 adb_mouse_writereg(int reg, uint8_t val) "reg %d val 0x%2.2x"
 adb_mouse_readreg(int reg, uint8_t val0, uint8_t val1) "reg %d obuf[0] 0x%2.2x obuf[1] 0x%2.2x"