ARM: dts: dra76x: m_can: fix order of clocks

According to the bosch,m_can.yaml bindings the first clock shall be the "hclk",
while the second clock "cclk".

This patch fixes the order accordingly.

Fixes: 0adbe832 ("ARM: dts: dra76x: Add MCAN node")
Cc: Faiz Abbas <faiz_abbas@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: linux-omap@vger.kernel.org
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Tony Lindgren <tony@atomide.com>