arm64: dts: amlogic: s6: Drop CPU masks from GICv3 PPI interrupts

arm64: dts: amlogic: s6: Drop CPU masks from GICv3 PPI interrupts

Unlike older GIC variants, the GICv3 DT bindings do not support
specifying a CPU mask in PPI interrupt specifiers.  Drop the masks.
While at it, replace the magic number for IRQ_TYPE_LEVEL_HIGH by its
symbolic definition.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/f9c6eddebebcd2e128edd2dbc51706e23589f9e8.1772643434.git.geert+renesas@glider.be
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>