reset: zynqmp: Implement rst_reset using PM_RESET_ACTION_PULSE

reset: zynqmp: Implement rst_reset using PM_RESET_ACTION_PULSE

Implement the rst_reset operation in the ZynqMP reset driver to use
PM_RESET_ACTION_PULSE. This allows the reset controller to perform
a reset pulse in a single firmware call instead of separate assert
and deassert calls.

This matches the Linux kernel implementation of zynqmp_reset_reset().

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/be77d6f1b60f591ef626c14229d85c5cab867967.1779709539.git.michal.simek@amd.com