soc: rockchip: grf: Support multiple grf to be handled

soc: rockchip: grf: Support multiple grf to be handled

Currently, only the first matched node will be handled. This leads
to jtag switching broken for RK3576, as rk3576-sys-grf is found before
rk3576-ioc-grf. Change the code to scan all the possible node to fix
the problem.

Fixes: e1aaecacfa13 ("soc: rockchip: grf: Add rk3576 default GRF values")
Cc: stable@vger.kernel.org
Cc: Detlev Casanova <detlev.casanova@collabora.com>
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Tested-by: Marco Schirrmeister <mschirrmeister@gmail.com>
Link: https://patch.msgid.link/1768524932-163929-3-git-send-email-shawn.lin@rock-chips.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>