arm64: dts: meson-gxm: fix gpu irq order

This fixes the following DT schemas check errors:
meson-gxm-khadas-vim2.dt.yaml: gpu@c0000: interrupt-names:0: 'job' was expected
meson-gxm-khadas-vim2.dt.yaml: gpu@c0000: interrupt-names:2: 'gpu' was expected

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>