arm64: dts: s32g3: Add the System Timer Module nodes

arm64: dts: s32g3: Add the System Timer Module nodes

The s32g3 has a STM module containing 12 timers. Each timer has a
dedicated interrupt and share the same clock.

Add the STM0->STM11 nodes for the s32g3 SoC. The STM7 node is not
added because it is slightly different and needs an extra property
which will be added later when supported by the driver.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Ghennadi Procopciuc <ghennadi.procopciuc@nxp.com>
Cc: Thomas Fossati <thomas.fossati@linaro.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>