The 'axi' clock are the bus APB clock, the 'disp_axi' clock are the
pixel data AXI clock. The naming is confusing. Fix the clock order.

Fixes: 94e6197d ("arm64: dts: imx8mp: Add LCDIF2 & LDB nodes")
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>