arm64: dts: ti: k3-j721s2-som-p0: Update mux-controller node name

commit f410a021af116102aa89eea61b5ea440c8b4fbf6 from
git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git



There are 2 mux-controller nodes in J721S2 which are responsible for
transferring can signals to the can phy but same node names for both
the mux-controllers led to errors while setting up both can phys
simultaneously. Thus, update node names for these mux-controller.

Fixes: 98f3b667 ("arm64: dts: ti: k3-j721s2: Add support for CAN instances 3 and 5 in main domain")
Signed-off-by: Bhavya Kapoor <b-kapoor@ti.com>
Signed-off-by: Xulin Sun <xulin.sun@windriver.com>