Input: RX51 keymap - fix recent compile breakage

Commit 3fea6026 ("Input: twl40300-keypad - fix handling of "all
ground" rows") broke compilation as I managed to use non-existent
keycodes.
Reported-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/arm/mach-omap2/board-rx51-peripherals.c

@@ -220,10 +220,10 @@ static int board_keymap[] = {
 	KEY(4, 4, KEY_LEFTCTRL),
 	KEY(4, 5, KEY_RIGHTALT),
 	KEY(4, 6, KEY_LEFTSHIFT),
-	KEY(4, 8, KEY_10),
+	KEY(4, 8, KEY_F10),
 
 	KEY(5, 0, KEY_Y),
-	KEY(5, 8, KEY_11),
+	KEY(5, 8, KEY_F11),
 
 	KEY(6, 0, KEY_U),