ARM: imx: fix i.MX35 CPU architecture

The data sheet of the i.MX35 says it is an ARM1136JF-S processor, version r1p3,
which, according to section "B.1. New instructions" of the ARM1136JF-S and
ARM1136J-S Technical Reference Manual, makes the i.MX35 CPU architecture not
only ARMv6, but ARMv6k.

Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: <linux-arm-kernel@lists.infradead.org>
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>